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152-588: A concise history of Westinghouse jet engine development may be found in the ASME technical paper entitled "Evolution of Heavy-Duty Power Generation and Industrial Gas Turbines in the United States" delivered at the ASME International Gas Turbine Conference, The Hague, June, 1994. This paper was compiled by Westinghouse engineers who had direct personal experience or close personal connections with

304-526: A "meatball" by Allied aircrew ) that is still in use to this day , the United States removed all areas of red color (specifically removing the red center to the roundel) and removed any sort of national fin/rudder markings , which at that time had seven horizontal red stripes , from the American national aircraft insignia scheme by 6 May 1942. The British did likewise, starting with a simple paintover with white paint, of their "Type C" roundel's red center, at about

456-527: A 3,200 nmi (5,900 km; 3,700 mi) range. A total of 154 Boeing 720s and 720Bs were built until 1967. Some 720s were later converted to the 720B specification. The 720 was succeeded by the Boeing 727 trijet. The 707-120 was the first production 707 variant, with a longer, wider fuselage, and greater wingspan than the Dash 80. The cabin had a full set of rectangular windows and could seat up to 189 passengers. It

608-495: A Dark Slate Grey/Extra Dark Sea Grey disruptive pattern on top and Sky undersides, but were later painted overall dark blue. As it had become imperative for all Allied aircraft in the Pacific Theater of World War II to abandon all use of any "red devices" in their national insignia — to prevent any chance of misidentification with Japanese military aircraft, all of which bore the circular, all-red Hinomaru insignia (nicknamed

760-406: A Dutch roll incident he experienced as a passenger on an early commercial 707 flight. As the aircraft's movements did not cease and most of the passengers became ill, he suspected a misrigging of the directional autopilot (yaw damper). He went to the cockpit and found the crew unable to understand and resolve the situation. He introduced himself and relieved the ashen-faced captain who immediately left

912-537: A Zero at slow speed, one on one. In these instances I considered myself fortunate to survive a battle. Of my 21 victories, 17 were against Zeros, and I lost five aircraft in combat. I was shot down three times and I crashed one that ploughed into the line back at base and wiped out another F4U. VMF-113 was activated on 1 January 1943 at Marine Corps Air Station El Toro as part of Marine Base Defense Air Group 41. They were soon given their full complement of 24 F4U Corsairs. On 26 March 1944, while escorting four B-25 bombers on

1064-693: A better fighter than the F4F Wildcat. For them, it was not as important that the F4U could be recovered aboard a carrier, as they usually flew from land bases. Growing pains aside, Marine Corps squadrons readily took to the radical new fighter. From February 1943 onward, the F4U operated from Guadalcanal and ultimately other bases in the Solomon Islands . A dozen USMC F4U-1s of VMF-124, commanded by Major William E. Gise, arrived at Henderson Field (code name "Cactus") on 12 February. The first recorded combat engagement

1216-487: A combustor section with 20 tubes (not interconnected at first), a single stage turbine and an adjustable jet exhaust nozzle. It was configured as a booster engine, with only the accessories needed to start and control the engine. The second engine built was flown in 1944 under a Chance Vought FG-1 fighter as a boost engine on the center-line. It delivered 1,365 lb of static thrust at sea level, standard day conditions. The booster engine could be started with impingement air on

1368-431: A contract for 584 F4U-1 fighters, which were given the name "Corsair" – inherited from the firm's late-1920s Vought O2U naval biplane scout, which first bore the name – on 30 June of the same year. The first production F4U-1 performed its initial flight a year later, on 24 June 1942. It was a remarkable achievement for Vought; compared to land-based counterparts, carrier aircraft are "overbuilt" and heavier, to withstand

1520-414: A convertible passenger–freight configuration, which became the most widely produced variant of the 707. The 707-320C added a strengthened floor and a new cargo door to the -320B model. The wing was fitted with three-section leading-edge flaps which allowed the removal of the underfin. A total of 335 of this variant were built, including some with JT3D-7 engines (19,000 lbf (85 kN) takeoff thrust) and

1672-454: A demonstration flight over Lake Washington outside Seattle , on August 7, 1955, test pilot Tex Johnston performed a barrel roll in the 367-80 prototype. Although he justified his unauthorized action to Bill Allen , then president of Boeing, as selling the airplane with a 1 'g' maneuver he was told not to do it again. The 132 in (3,400 mm) wide fuselage of the Dash 80 was large enough for four-abreast (two-plus-two) seating like

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1824-589: A different opinion, stating that "In order to simplify spares problems and also to insure flexibility in carrier operations present practice in the Pacific is to assign all Corsairs to Marines and to equip FightRons [fighter squadrons] on medium and light carriers with Hellcats." VF-12 soon abandoned its aircraft to the Marines. VF-17 kept its Corsairs, but was removed from its carrier, USS Bunker Hill , due to perceived difficulties in supplying parts at sea. The Marines needed

1976-484: A fuselage 55 feet (17 m) longer than the 707-320B, to 208.6 feet (63.6 m) in length. This second model would have carried 225 passengers in mixed-class configuration and 279 passengers in all-economy configuration. Like the 707-620, the 707-820 was also set to compete with the stretched DC-8-60 Super Series models. The design was being pitched to American, TWA, BOAC, and Pan Am at the time of its proposal in early 1965. The 707-820 would have cost US$ 10,000,000. Like

2128-648: A joint venture with Seven Q Seven (SQS) and Omega Air, selected the JT8D-219 low-bypass turbofan as a replacement powerplant for Boeing 707-based aircraft, calling their modified configuration a 707RE. Northrop Grumman selected the -219 to re-engine the US Air Force's fleet of 19 E-8 Joint STARS aircraft, which would allow the J-STARS more time on station due to the engine's greater fuel efficiency. NATO also planned to re-engine their fleet of E-3 Sentry AWACS aircraft. The -219

2280-463: A kink in the trailing edge to add area inboard. Takeoff weight was increased to 302,000 lb (137,000 kg) initially and to 312,000 lb (142,000 kg) with the higher-rated JT4As and center section tanks. Its first flight was on January 11, 1958; 69 turbojet 707-320s were delivered through January 1963, the first passengers being carried (by Pan Am) in August 1959. The 707-420 was identical to

2432-436: A longer fuselage and wing meant a painstaking redesign of the wing and landing-gear structures. Rather than spend money on upgrading the 707, engineer Joe Sutter stated the company "decided spending money on the 707 wasn't worth it". The project was cancelled in 1966 in favor of the newer Boeing 747. The 707-820 was a proposed intercontinental stretched variant of the 707-320B. This 412,000-pound MTOW (187,000 kg) variant

2584-566: A radio operator/navigator. The Royal Navy hurriedly adopted higher-performance single-seat aircraft such as the Hawker Sea Hurricane and the less robust Supermarine Seafire alongside, but neither aircraft had sufficient range to operate at a distance from a carrier task force. The Corsair was welcomed as a more robust and versatile alternative. In November 1943, the Royal Navy received its first batch of 95 Vought F4U-1s, which were given

2736-521: A raid over Ponape, they recorded their first enemy kills, downing eight Japanese aircraft. In April of that year, VMF-113 was tasked with providing air support for the landings at Ujelang . Since the assault was unopposed, the squadron quickly returned to striking Japanese targets in the Marshall Islands for the remainder of 1944. Corsairs were flown by the "Black Sheep" Squadron ( VMF-214 , led by Marine Major Gregory "Pappy" Boyington ) in an area of

2888-522: A shore-based unit in the Solomon Islands, VF-17 reinstalled the tail hooks so its F4Us could land and refuel while providing top cover over the task force participating in the carrier raid on Rabaul . The squadron's pilots landed, refueled, and took off from their former home, Bunker Hill and USS  Essex on 11 November 1943. Twelve USMC F4U-1s arrived at Henderson Field (Guadalcanal) on 12 February 1943. The U.S. Navy did not get into combat with

3040-594: A stronger structure to support a maximum takeoff weight increased by 19,000 lb (8,600 kg), along with modifications to the wing. The 707-320B series enabled nonstop westbound flights from Europe to the West Coast of the United States and from the US to Japan. The final 707 variant was the 707-320C, (C for "Convertible"), which had a large fuselage door for cargo. It had a revised wing with three-sectioned leading-edge flaps, improving takeoff and landing performance and allowing

3192-588: A takeoff weight of 335,000 lb (152,000 kg). Most -320Cs were delivered as passenger aircraft with airlines hoping the cargo door would increase second-hand values. The addition of two additional emergency exits, one on either side aft of the wing raised the maximum passenger limit to 219. Only a few aircraft were delivered as pure freighters. One of the final orders was by the Iranian Government for 14 707-3J9C aircraft capable of VIP transportation, communication, and in-flight refueling tasks. The 707-700

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3344-580: A threat to the 757 and 767 programs. The information gathered from testing led to the eventual retrofitting of CFM56 engines to the USAF C-135/KC-135R models, and some military versions of the 707 also used the CFM56. The Douglas DC-8 "Super 70" series with CFM56 engines was developed and extended the DC-8's life in a stricter noise regulatory environment. As a result, significantly more DC-8s remained in service into

3496-532: A total of 21 kills during the war. He remembered: I learned quickly that altitude was paramount. Whoever had altitude dictated the terms of the battle, and there was nothing a Zero pilot could do to change that — we had him. The F4U could outperform a Zero in every aspect except slow speed manoeuvrability and slow speed rate of climb. Therefore you avoided getting slow when combating a Zero. It took time but eventually we developed tactics and deployed them very effectively... There were times, however, that I tangled with

3648-456: A viable option because the installation of larger, more powerful engines would need a larger undercarriage, which was not feasible given the design's limited ground clearance at takeoff. Boeing's answer to the problem was the first wide-body airliner—the Boeing 747 . The 707's first-generation engine technology was also rapidly becoming obsolete in the areas of noise and fuel economy, especially after

3800-592: A year earlier. A technical assistance agreement with Rolls-Royce appeared to influence many engines proposed after early 1952, but none of these designs found acceptance by US airframe manufacturers or the military. Following closure of AGT Division in 1960, many of its engineers joined the growing land-based gas turbine business of Westinghouse's Small Steam & Gas Turbine Division, located at its Steam Turbine manufacturing headquarters in Lester, PA, near to Philadelphia. Vought F4U Corsair The Vought F4U Corsair

3952-517: A year. The only rival in intercontinental jet aircraft production at the time was the British de Havilland Comet. However, the Comet series had been the subject of fatal accidents (due to design flaws) early in its introduction and withdrawn from service; virtually redesigned from scratch, it was still smaller and slower than the 707 when reintroduced as version -4. In addition, airlines and their passengers at

4104-604: Is an American fighter aircraft that saw service primarily in World War II and the Korean War . Designed and initially manufactured by Chance Vought , the Corsair was soon in great demand; additional production contracts were given to Goodyear , whose Corsairs were designated FG , and Brewster , designated F3A . The Corsair was designed and principally operated as a carrier-based aircraft , and entered service in large numbers with

4256-558: Is publicized as being half the cost of the competing powerplant, the CFM International CFM56 , and is 40 dB quieter than the original JT3D engines. The first commercial orders for the 707 came on October 13, 1955, when leading global carrier Pan Am committed to 20 Boeing 707s, and 25 Douglas DC-8s, dramatically increasing their passenger capacity (in available revenue passenger seat-miles per hour/per day) over its existing fleet of propeller aircraft. The competition between

4408-567: Is stretched slightly by 8 feet (2.4 m). Powered by Pratt & Whitney JT4A turbojets, the 707-320 entered service in 1959, and the 707-420 with Rolls-Royce Conway turbofans in 1960. The 720, a lighter short-range variant, was also introduced in 1960. Powered by Pratt & Whitney JT3D turbofans, the 707-120B debuted in 1961 and the 707-320B in 1962. The 707-120B typically flew 137 passengers in two classes over 3,600 nautical miles [nmi] (6,700 km; 4,100 mi), and could accommodate 174 in one class. With 141 passengers in two classes,

4560-480: The 1973 oil crisis . Operations of the 707 were threatened by the enactment of international noise regulations in 1985. Shannon Engineering of Seattle developed a hush kit with funding from Tracor, Inc , of Austin, Texas. By the late 1980s, 172 Boeing 707s had been equipped with the Quiet 707 package. Boeing acknowledged that more 707s were in service than before the hush kit was available. Trans World Airlines flew

4712-456: The 377 Stratocruiser , quickly faded with only 56 examples sold and no new orders as the 1940s drew to a close. That venture had netted the company a $ 15 million loss. During 1949 and 1950, Boeing embarked on studies for a new jet transport and saw advantages with a design aimed at both military and civilian markets. Aerial refueling was becoming a standard technique for military aircraft, with over 800 KC-97 Stratofreighters on order. The KC-97

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4864-581: The Dutch East Indies . In July and August 1945, Corsair naval squadrons 1834, 1836, 1841, and 1842 took part in a series of strikes on the Japanese mainland, near Tokyo. These squadrons operated from Victorious and Formidable. On 9 August 1945, days before the end of the war, Corsairs from Formidable attacked Shiogama harbor on the northeast coast of Japan. Royal Canadian Navy Volunteer Reserve pilot, Lieutenant Robert Hampton Gray , of 1841 Squadron

5016-643: The New Hebrides . From April, these workshops became responsible for assembling all Corsairs for the RNZAF units operating the aircraft in the South West Pacific; and a Test and Despatch flight was set up to test the aircraft after assembly. By June 1944, 100 Corsairs had been assembled and test flown. The first squadrons to use the Corsair were 20 and 21 Squadrons on Espiritu Santo, operational in May 1944. The organization of

5168-488: The "20" part of the designation is Boeing's "customer number" for its development aircraft. Announced in July 1957 as a derivative for shorter flights from shorter runways, the 707-020 first flew on November 23, 1959. Its type certificate was issued on June 30, 1960, and it entered service with United Airlines on July 5, 1960. As a derivative, the 720 had low development costs, allowing profitability despite few sales. Compared to

5320-404: The -320 by adding a second inboard kink, a dog-toothed leading edge, and curved low-drag wingtips instead of the earlier blunt ones. These wingtips increased overall wingspan by 3.0 ft (0.9 m). Takeoff gross weight was increased to 328,000 lb (149,000 kg). The 175 707-320B aircraft were all new-build; no original -320 models were converted to fan engines in civilian use. First service

5472-409: The -320, but fitted with Rolls-Royce Conway 508 (RCo.12) turbofans (or by-pass turbojets as Rolls-Royce called them) of 18,000 lbf (80 kN) thrust each. The first announced customer was Lufthansa . BOAC 's controversial order was announced six months later, but the British carrier got the first service-ready aircraft off the production line. The British Air Registration Board refused to give

5624-560: The -320, but with Conway turbofan engines. Though initially fitted with turbojet engines, the dominant engine for the Boeing 707 family was the Pratt & Whitney JT3D , a turbofan variant of the JT3C with lower fuel consumption and higher thrust. JT3D-engined 707s and 720s were denoted with a "B" suffix. While many 707-120Bs and -720Bs were conversions of existing JT3C-powered machines, 707-320Bs were available only as newly built aircraft, as they had

5776-595: The 1930s, be dropped on enemy aircraft formations. In June 1938, the U.S. Navy signed a contract with Vought for a prototype bearing the factory designation V-166B , the XF4U-1, BuNo 1443. The Corsair design team was led by Rex Beisel . After mock-up inspection in February 1939, construction of the XF4U-1 powered by an XR-2800-4 prototype of the Pratt & Whitney R-2800 Double Wasp twin-row, 18-cylinder radial engine , rated at 1,805 hp (1,346 kW) went ahead quickly, as

5928-496: The 1940s, to meet the growing needs of the Navy for higher thrust and longer range (a jet bomber was planned as well as new Navy fighter jets), Westinghouse began development of the J40 , with a target thrust of 7500 lb. (10,900 lb. with afterburner). The J40 program was plagued by delays and development problems. The most significant of these were the failure of the electronic control system and

6080-461: The 1970s, on domestic , transcontinental , and transatlantic flights , as well as cargo and military applications. It established Boeing as a dominant airliner manufacturer with its 7x7 series . The initial, 145-foot-long (44 m) 707-120 was powered by Pratt & Whitney JT3C turbojet engines. The shortened, long-range 707-138 and the more powerful 707-220 entered service in 1959. The longer-range, heavier 707-300/400 series has larger wings and

6232-432: The 21st century than 707s. The 707-620 was a proposed domestic range-stretched variant of the 707-320B. The 707-620 was to carry around 200 passengers while retaining several aspects of the 707-320B. It would have been delivered around 1968 and would have also been Boeing's answer to the stretched Douglas DC-8 Series 60 . Had the 707-620 been built, it would have cost around US$ 8,000,000. However, engineers discovered that

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6384-399: The 707 also led to the upgrading of air traffic control systems to prevent interference with military jet operations. As the 1960s drew to a close, the exponential growth in air travel led to the 707 being a victim of its own success. The 707 had become too small to handle the increased numbers of passengers on the routes for which it had been designed. Stretching the fuselage again was not

6536-461: The 707 and DC-8 was fierce. Pan Am ordered these planes when and as they did so that they would be the operators of the "first-off" production line for each aircraft type. Once the initial batch of the aircraft had been delivered to them and put into operation, Pan Am would have the distinction of being not only the "Launch Customer" for both transcontinental American jets, but the exclusive operator of American intercontinental jet transports for at least

6688-477: The 707 is a swept wing quadjet with podded engines . Its larger fuselage cross-section allowed six-abreast economy seating, retained in the later 720 , 727 , 737 , and 757 models. Although it was not the first commercial jetliner in service, the 707 was the first to be widespread, and is often credited with beginning the Jet Age . It dominated passenger air-transport in the 1960s, and remained common through

6840-425: The 707's width again to compete, this time to 148 in (3,760 mm). The first flight of the first-production 707-120 took place on December 20, 1957, and FAA certification followed on September 18, 1958. Both test pilots Joseph John "Tym" Tymczyszyn and James R. Gannett were awarded the first Iven C. Kincheloe Award for the test flights that led to certification. A number of changes were incorporated into

6992-501: The 707-120, it has a length reduced by 9 feet (2.7 m), a modified wing and a lightened airframe for a lower maximum takeoff weight . Powered by four Pratt & Whitney JT3C turbojets, the initial 720 could cover a 2,800 nmi (5,200 km; 3,200 mi) range with 131 passengers in two classes. Powered by JT3D turbofans, the 720B first flew on October 6, 1960, and entered service in March 1961. It could seat 156 passengers in one class over

7144-648: The 707-320/420 could fly 3,750 nmi (6,940 km; 4,320 mi) and the 707-320B up to 5,000 nmi (9,300 km; 5,800 mi). The 707-320C convertible passenger-freighter model entered service in 1963, and passenger 707s have been converted to freighter configurations. Military derivatives include the E-3 Sentry airborne reconnaissance aircraft and the C-137 Stratoliner VIP transport. In total, 865 Boeing 707s were produced and delivered, not including 154 Boeing 720s. During and after World War II, Boeing

7296-535: The Allison J71 with an afterburner was substituted. Due to delays in afterburner development on that engine, initial production of the long delayed F3H-2N was begun using the earlier J40 as a stop-gap. This soon proved to be a major mistake and both the J40 and Demon were grounded after a number of aircraft were lost. Ultimately, other aircraft planned for the J40 were either cancelled or outfitted with alternative engines, and

7448-622: The Americans. In all, out of 18 carrier-based squadrons, eight saw combat, flying intensive ground attack/interdiction operations and claiming 47.5 aircraft shot down. At the end of World War II, under the terms of the Lend-Lease agreement, the aircraft had to be paid for or to be returned to the U.S. As the UK did not have the means to pay for them, the Royal Navy Corsairs were pushed overboard into

7600-501: The B-47 and B-52, and had developed the yaw damper system on the B-47 that would be applied to later swept-wing configurations like the 707. However, many pilots new to the 707 had no experience with this instability as they were mostly accustomed to flying straight-wing propeller-driven aircraft such as the Douglas DC-7 and Lockheed Constellation . On one customer-acceptance flight, where

7752-568: The Boeing 707. After suspending its scheduled passenger service in April 2013, Saha continued to operate a small fleet of 707s on behalf of the Iranian Air Force . As of 2019, only a handful of 707s remain in operation, acting as military aircraft for aerial refueling, transport, and AWACS missions. Although certified as Series 100s, 200s, 300s, etc., the different 707 variants are more commonly known as Series 120s, 220s, 320s, and so on, where

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7904-430: The Corsair entered service. Carrier suitability was a major development issue, prompting changes to the main landing gear, tail wheel, and tailhook . Early F4U-1s had difficulty recovering from developed spins, since the inverted gull wing's shape interfered with elevator authority. It was also found that the Corsair's left wing could stall and drop rapidly and without warning during slow carrier landings. In addition, if

8056-472: The Corsair was "...an excellent carrier type and very easy to land aboard. It is no different than any other airplane." Two Navy units, VF-12 (October 1942) and later VF-17 (April 1943) were equipped with the F4U. By April 1943, VF-12 had successfully completed deck landing qualification. At the time, the U.S. Navy also had the Grumman F6F Hellcat, which did not have the performance of the F4U, but

8208-434: The Corsair's payload and range in the attack role and to help evaluate future viability of single- versus twin-engine fighter design for Vought. Lindbergh managed to get the F4U into the air with 4,000 pounds (1,800 kg) of bombs, with a 2,000 pounds (910 kg) bomb on the centerline and a 1,000 pounds (450 kg) bomb under each wing. In the course of such experiments, he performed strikes on Japanese positions during

8360-525: The Corsair, was considered simpler to land on a carrier by an inexperienced pilot and proved to be successful almost immediately after introduction. The Navy's decision to choose the Hellcat meant that the Corsair was released to the U.S. Marine Corps. With no initial requirement for carrier landings, the Marine Corps deployed the Corsair to devastating effect from land bases. Corsair deployment aboard U.S. carriers

8512-460: The DC-8, such as United , Delta , and Eastern , were left without jets until September and lost market share on transcontinental flights. Qantas was the first non-US airline to use the 707s, starting in 1959. The 707 quickly became the most popular jetliner of its time. Its success led to rapid developments in airport terminals, runways, airline catering, baggage handling, reservations systems, and other air transport infrastructure. The advent of

8664-461: The F4U had equipped all ten Pacific-based fighter squadrons of the RNZAF. Boeing 707 The Boeing 707 is an early American long-range narrow-body airliner , the first jetliner developed and produced by Boeing Commercial Airplanes . Developed from the Boeing 367-80 prototype first flown in 1954, the initial 707-120 first flew on December 20, 1957. Pan Am began regular 707 service on October 26, 1958. With versions produced until 1979,

8816-478: The F4U were given different armaments. While most Corsair variants had the standard armament of six .50 caliber M2 Browning machine guns, some models (like the F4U-1C) were equipped with four 20 millimeter M2 cannons for its main weapon. While these cannons were more powerful than the standard machine guns, they were not favored over the standard loadout. Only 200 models of this particular Corsair model were produced, out of

8968-544: The F4U-1D, but not separately designated in British use). 430 Brewster Corsairs (334 F3A-1 and 96 F3A-1D), more than half of Brewster's total production, were delivered to Britain as the Corsair Mk III. 857 Goodyear Corsairs (400 FG-1/-1A and 457 FG-1D) were delivered and designated Corsair Mk IV. The Mk IIs and Mk IVs were the only versions to be used in combat. The Royal Navy cleared the F4U for carrier operations well before

9120-596: The F4U-1s were assembled by Unit 60 with a further batch assembled and flown at RNZAF Station Hobsonville . In total there were 336 F4U-1s and 41 F4U-1Ds used by the RNZAF during the Second World War. Sixty FG-1Ds arrived late in the war. The first deliveries of lend-lease Corsairs began in March 1944 with the arrival of 30 F4U-1s at the RNZAF Base Depot Workshops (Unit 60) on the island of Espiritu Santo in

9272-625: The J30 engine.) The J34, a 34-in. diameter engine that delivered 3000 lb. of thrust, turned out to be the last production engine built by Westinghouse at its Aviation Gas Turbine Division facility in Kansas City, Missouri . It was used extensively by the Navy in the McDonnell F2D Banshee , the Douglas F3D Skyknight and Vought F7U-1 Cutlass , with the addition of an afterburner. Late in

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9424-520: The J40 was never qualified for full production. The program was terminated in 1955. Although production and support of the J34 continued, Westinghouse exited the jet engine business in 1960, closing the Kansas City operation, after having supplied engines for 1223 Navy jet planes. Ironically, the first Pan Am Boeing 707 had just flown its maiden commercial flight, powered by Pratt & Whitney jet engines, just

9576-475: The Pacific War, this was due in part to operational circumstances; it primarily faced air-to-air combat in the Solomon Islands and Rabaul campaigns (as well as at Leyte and for kamikaze interception), but as operations shifted north and its mission shifted to ground attack the aircraft saw less exposure to enemy aircraft, while other fighter types were exposed to more air combat. Against the best Japanese opponents,

9728-546: The Pacific without tailhooks installed. Corsairs also served well as fighter-bombers in the Central Pacific and the Philippines. By early 1944, Marine pilots were beginning to exploit the type's considerable capabilities in the close-support role in amphibious landings. Charles Lindbergh flew Corsairs with the Marines as a civilian technical advisor for United Aircraft Corporation in order to determine how best to increase

9880-603: The R-2800. But whereas the P-47 achieved its highest speed at 30,020 feet (9,150 m) with the help of an intercooled turbocharger , the F4U-1 reached its maximum speed at 19,900 ft (6,100 m) using a mechanically supercharged engine. The U.S. Navy received its first production F4U-1 on 31 July 1942, though getting it into service proved difficult. The framed "birdcage" style canopy provided inadequate visibility for deck taxiing, and

10032-438: The RNZAF in the Pacific and New Zealand meant that only the pilots and a small staff belonged to each squadron (the maximum strength on a squadron was 27 pilots): squadrons were assigned to several Servicing Units (SUs, composed of 5–6 officers, 57 NCOs, 212 airmen) which carried out aircraft maintenance and operated from fixed locations: hence F4U-1 NZ5313 was first used by 20 Squadron/1 SU on Guadalcanal in May 1944; 20 Squadron

10184-639: The Solomon Islands called " The Slot ". Boyington was credited with 22 kills in F4Us (of 28 total, including six in an AVG P-40 , although his score with the AVG has been disputed). Other noted Corsair pilots of the period included VMF-124's Kenneth Walsh , James E. Swett , Archie Donahue , and Bill "Casey" Case; VMF-215 's Robert M. Hanson and Donald Aldrich ; and VF-17's Tommy Blackburn , Roger Hedrick , and Ira Kepford . Nightfighter versions equipped Navy and Marine units afloat and ashore. One particularly unusual kill

10336-542: The Stratocruiser. Answering customers' demands and under Douglas competition, Boeing soon realized this would not provide a viable payload, so it widened the fuselage to 144 in (3,660 mm) to allow five-abreast seating and use of the KC-135's tooling. Douglas Aircraft had launched its DC-8 with a fuselage width of 147 in (3,730 mm). The airlines liked the extra space and six-abreast seating, so Boeing increased

10488-530: The U.S. Navy and Marines in World War II. It quickly became one of the most capable carrier-based fighter-bombers of the war. Some Japanese pilots regarded it as the most formidable American fighter and U.S. naval aviators achieved an 11:1 kill ratio . Early problems with carrier landings and logistics led to it being eclipsed as the dominant carrier-based fighter by the Grumman F6F Hellcat , powered by

10640-552: The U.S. Navy and showed that the Corsair Mk II could be operated with reasonable success even from escort carriers . It was not without problems; one was excessive wear of the arrester wires, due both to the weight of the Corsair and the understandable tendency of the pilots to stay well above the stalling speed. A total of 2,012 Corsairs were supplied to the United Kingdom. Fleet Air Arm (FAA) units were created and equipped in

10792-474: The United States, at Quonset Point or Brunswick and then shipped to war theaters aboard escort carriers. The first FAA Corsair unit was 1830 NAS , created on the first of June 1943, and soon operating from HMS  Illustrious . At the end of the war, 18 FAA squadrons were operating the Corsair. British Corsairs served both in Europe and in the Pacific. The first, and also most important, European operations were

10944-786: The added benefit of minimizing complexity. (These Corsairs’ wings could still be manually folded. ) A second option was to remove the folding mechanism in the field using a kit, which could be done for Vought and Brewster Corsairs as well. On 6 December 1943, the Bureau of Aeronautics issued guidance on weight-reduction measures for the F4U-1, FG-1, and F3A. Corsair squadrons operating from land bases were authorized to remove catapult hooks, arresting hooks, and associated equipment, which eliminated 48 pounds of unnecessary weight. While there are no data to indicate to what extent these modifications were incorporated, there are numerous photos in evidence of Corsairs, of various manufacturers and models, on islands in

11096-423: The aircraft a certificate of airworthiness, citing insufficient yaw control, excessive rudder forces, and the ability to over-rotate on takeoff, stalling the wing on the ground (a fault of the de Havilland Comet 1). Boeing responded by adding 40 in (100 cm) to the vertical stabilizer, applying full instead of partial rudder boost, and fitting an underfin to prevent over-rotation. These modifications except to

11248-562: The aircraft claimed a 12:1 kill ratio against the Mitsubishi A6M Zero and 6:1 against the Nakajima Ki-84 , Kawanishi N1K -J, and Mitsubishi J2M combined during the last year of the war. The Corsair bore the brunt of U.S. fighter-bomber missions, delivering 15,621 short tons (14,171 metric tons) of bombs during the war (70% of total bombs dropped by U.S. fighters during the war). Corsair losses in World War II were as follows: In

11400-444: The arrival of the turbofan-powered 707-120B. The 707-320 Intercontinental is a stretched version of the turbojet-powered 707-120, initially powered by JT4A-3 or JT4A-5 turbojets producing 15,800 lbf (70.3 kN) each (most eventually got 17,500 lbf (77.8 kN) JT4A-11s). The interior allowed up to 189 passengers, the same as the -120 and -220 series, but improved two-class capacity due to an 80-in fuselage stretch ahead of

11552-553: The battle for the Marshall Islands. By the beginning of 1945, the Corsair was a full-blown "mudfighter", performing strikes with high-explosive bombs, napalm tanks, and HVARs . It proved versatile, able to operate everything from Bat glide bombs to 11.75 in (298 mm) Tiny Tim rockets. The aircraft was a prominent participant in the fighting for the Palaus , Iwo Jima and Okinawa. In November 1943, while operating as

11704-416: The cockpit feeling ill. Johnston disconnected the faulty autopilot and manually stabilized the plane "with two slight control movements". Johnston recommended Boeing increase the height of the tail fin , add a boosted rudder as well as add a ventral fin . These modifications were aimed at mitigating Dutch roll by providing more directional stability in yaw . The initial 145-foot-long (44 m) 707-120

11856-534: The control surfaces and access panels, and in one case, an engine failure. The spin recovery standards also had to be relaxed, as recovery from the required two-turn spin proved impossible without resorting to an antispin chute. The problems clearly meant delays in getting the design into production. Reports coming back from the war in Europe indicated an armament of two .30 in (7.62 mm) synchronized engine cowling-mount machine guns, and two .50 in (12.7 mm) machine guns (one in each outer wing panel)

12008-634: The cowl flaps across the top of the engine compartment, diverting oil and hydraulic fluid spray around the sides of the fuselage. The curved approach used with the Seafire was also adopted for landing Corsairs, ensuring the flight deck was kept in sight as long as possible. The Royal Navy initially received 95 "birdcage" F4U-1s from Vought which were designated Corsair Mk I in Fleet Air Arm service. Next from Vought came 510 "blown-canopy" F4U-1A/-1Ds, which were designated Corsair Mk II (the final 150 equivalent to

12160-467: The deckhead. The change in span brought about the added benefit of improving the sink rate , reducing the F4U's propensity to "float" in the final stages of landing. The Royal Navy developed a number of modifications to the Corsair that made carrier landings more practical. Among these were a bulged canopy (similar to the Malcolm Hood ), raising the pilot's seat 7 in (180 mm), and wiring shut

12312-448: The design constraints imposed by limitations of late-1940s jet engines, developing a robust, safe, and high-capacity jet aircraft was within reach for Boeing. Boeing studied numerous wing and engine layouts for its new transport/tanker, some of which were based on the B-47 and C-97, before settling on the 367-80 "Dash 80" quadjet prototype aircraft. Less than two years elapsed from project launch in 1952 to rollout on May 14, 1954, with

12464-599: The designation "Corsair [Mark] I". The first squadrons were assembled and trained on the U.S. East Coast and then shipped across the Atlantic. The Royal Navy put the Corsair into carrier operations immediately. They found its landing characteristics dangerous, suffering a number of fatal crashes, but considered the Corsair to be the best option they had. In Royal Navy service, because of the limited hangar deck height in several classes of British carrier, many Corsairs had their outer wings "clipped" by 8 in (200 mm) to clear

12616-469: The early days of World War II, Royal Navy fighter requirements had been based on cumbersome two-seat designs, such as the fighter/dive-bomber Blackburn Skua (and its turreted derivative the Blackburn Roc ) and the fighter/reconnaissance Fairey Fulmar , since it was expected that they would encounter only long-range bombers or flying boats and that navigation over featureless seas required the assistance of

12768-423: The end of the war indicate that the F4U and FG flew 64,051 operational sorties for the U.S. Marines and U.S. Navy through the conflict (44% of total fighter sorties), with only 9,581 sorties (15%) flown from carrier decks. F4U and FG pilots claimed 2,140 air combat victories against 189 losses to enemy aircraft, for an overall kill ratio of over 11:1. While this gave the Corsair the lowest loss rate of any fighter of

12920-433: The extreme stress of deck landings. The F4U incorporated the largest engine available at the time, the 2,000 hp (1,500 kW) 18-cylinder Pratt & Whitney R-2800 Double Wasp radial . To extract as much power as possible, a relatively large Hamilton Standard Hydromatic three-blade propeller of 13 feet 4 inches (4.06 m) was used. To accommodate a folding wing, the designers considered retracting

13072-513: The fin under the tail became standard on all 707 variants and were retrofitted to all earlier 707s. The 37 -420s were delivered to BOAC, Lufthansa, Air-India , El Al , and Varig through November 1963; Lufthansa was the first to carry passengers, in March 1960. The 707-320B had the application of the JT3D turbofan to the Intercontinental, but with aerodynamic refinements. The wing was modified from

13224-478: The first Dash 80 flying on July 15, 1954. The prototype was a proof-of-concept aircraft for both military and civilian use. The United States Air Force was the first customer, using it as the basis for the KC-135 Stratotanker aerial refueling and cargo aircraft. Whether the passenger 707 would be profitable was far from certain. At the time, nearly all of Boeing's revenue came from military contracts. In

13376-416: The first airframe ever designed from the start to have a Double Wasp engine fitted for flight. When the prototype was completed, it had the biggest and most powerful engine, largest propeller, and probably the largest wing on any naval fighter to date. The first flight of the XF4U-1 was made on 29 May 1940, with Lyman A. Bullard, Jr. at the controls. The maiden flight proceeded normally until a hurried landing

13528-408: The initial 707's wing to help increase range and payload, giving birth to the 707-320. Pan Am inaugurated 707 service with a christening at National Airport on October 17, 1958, attended by President Eisenhower , followed by a transatlantic flight for VIPs (personal guests of founder Juan Trippe ) from Baltimore's Friendship International Airport to Paris. The aircraft's first commercial flight

13680-499: The jets would bear 700-series numbers, and the first would be the 707. The marketing personnel at Boeing chose 707 because they thought it was more appealing than 700. The project was enabled by the Pratt & Whitney JT3C turbojet engine, the civilian version of the J57 that yielded much more power than the previous generation of jet engines and was proving itself with the B-52. Freed from

13832-622: The last new-build 707 airframes built as E-3 and E-6 aircraft. Traces of the 707 are still found in the 737 , which uses a modified version of the 707's fuselage, as well as the same external nose and cockpit configurations as those of the 707. These were also used on the previous 727 , while the 757 also used the 707 fuselage cross-section. The 707's wings are swept back at 35°, and like all swept-wing aircraft, display an undesirable " Dutch roll " flying characteristic that manifests itself as an alternating combined yawing and rolling motion. Boeing already had considerable experience with this on

13984-428: The last scheduled 707 flight for passengers by a US carrier on October 30, 1983, although 707s remained in scheduled service by airlines from other nations for much longer. Middle East Airlines of Lebanon flew 707s and 720s in front-line passenger service until the end of the 1990s. Since LADE of Argentina removed its 707-320Bs from regular service in 2007, Saha Airlines of Iran was the last commercial operator of

14136-531: The later JT3D-3 version giving 18,000 lbf (80 kN). (This thrust did not require water injection, eliminating both the system and 5000–6000 lb of water.) The -120B had the wing modifications introduced on the 720 and a longer tailplane; a total of 72 were built, 31 for American and 41 for TWA, plus six short-bodied -138Bs for Qantas. American had its 23 surviving -123s converted to -123Bs, but TWA did not convert its 15 -131s. The only other conversions were Pan Am's five surviving -121s and one surviving -139,

14288-413: The launch order for 20 707-121 aircraft by Pan Am and an American Airlines order for 30 707-123 aircraft. The first revenue flight was on October 26, 1958; 56 were built, plus seven short-bodied -138s; the last -120 was delivered to Western in May 1960. The 707-138 was a -120 with a fuselage 10 ft (3.0 m) shorter than the others, with 5 ft (1.5 m) (three frames) removed ahead and behind

14440-428: The legs allowed the hydraulic pressure to be released gradually as the aircraft landed. The Corsair was not considered fit for carrier use until the wing stall problems and the deck bounce could be solved. Meanwhile, the more docile and simpler-to-build F6F Hellcat had begun entering service in its intended carrier-based use. The Navy wanted to standardize on one type of carrier fighter, and the Hellcat, while slower than

14592-560: The long "hose nose" and nose-up attitude of the Corsair made it difficult to see straight ahead. The enormous torque of the Double Wasp engine also made it a handful for inexperienced pilots if they were forced to bolter . Early Navy pilots called the F4U the "hog", "hosenose", or "bent-wing widow maker". Carrier qualification trials on the training carrier USS Wolverine and escort carriers USS Core and USS Charger in 1942 found that, despite visibility issues and control sensitivity,

14744-478: The main landing gear rearward, but for the chord of wing that was chosen, making the landing gear struts long enough to provide ground clearance for the large propeller was difficult. Their solution was an inverted gull wing , which considerably shortened the required length of the struts. The anhedral of the wing's inboard section also permitted the wing and fuselage to meet at the optimum angle for minimizing drag , without using wing-root fairings. The bent wing

14896-404: The maximum takeoff weight the same as that of the -120 (247,000 lb (112 t)), the -138 was able to fly the longer routes that Qantas needed. Braniff International Airways ordered the higher-thrust version with Pratt & Whitney JT4 A engines, the 707-220. The final major derivative was the 707-320, which featured an extended-span wing and JT4A engines, while the 707-420 was the same as

15048-399: The need to replace it, development of the afterburner and the integration of the afterburner into the engine control system. The McDonnell F3H-1N Demon was the primary target for the engine and during development, its weight increased dramatically and the thrust of the original J40 was no longer adequate. An improved J40 with a 13 stage compressor and increased air flow failed in development and

15200-535: The new designation system, it was now called the J30. It was used to power the Navy’s first production jet fighter, the McDonnell Douglas FH-1 Phantom . 61 FH-1 Phantoms were equipped with the J30 engine. (It is noteworthy that Pratt & Whitney Aircraft , then a major producer of piston aircraft engines for the military, entered the jet engine business in 1945 as a Westinghouse/US Navy licensee to build

15352-462: The new jet service StarStream , launching its first jet service, between New York-Idlewild International Airport and San Francisco International Airport , on January 25, 1959. American Airlines was the first domestic airline to fly its own jets, on January 25, 1959. TWA started domestic 707-131 flights in March and Continental Airlines started 707-124 flights in June; airlines that had ordered only

15504-411: The outer port (number 1) engine mount is distinctly different from the other three, as this engine is not fitted with a turbocompressor. Later-model 707s typically had this configuration, although American Airlines had turbocompressors on engines 2 and 3 only. Early 707 models often had turbocompressor fairings on all four engines, but with only two or three compressors installed. Pratt & Whitney, in

15656-456: The outer) meant the location of the wing fuel tanks had to be changed. In order to keep the fuel tank close to the center of gravity , the only available position was in the forward fuselage, ahead of the cockpit. Accordingly, as a 237 US gal (897 L) self-sealing fuel tank replaced the fuselage mounted armament, the cockpit had to be moved back by 32 in (810 mm) and the fuselage lengthened. Later on, different variants of

15808-441: The pilot with a limited rear view over his shoulders. A rectangular Plexiglas panel was inset into the lower center section to allow the pilot to see directly beneath the aircraft and assist with deck landings. The engine used was the more powerful R-2800-8 (B series) Double Wasp which produced 2,000 hp (1,500 kW). On the wings the flaps were changed to a NACA slotted type and the ailerons were increased in span to increase

15960-403: The production models from the prototype. A Krueger flap was installed along the leading edge between the inner and outer engines on early 707-120 and -320 models. This was in response to de Havilland Comet overrun accidents which occurred after over-rotating on take-off. Wing stall would also occur on the 707 with over-rotation so the leading-edge flaps were added to prevent stalling even with

16112-661: The prototypes of the McDonnell XFD-1 and two powered the ill-fated Northrop XF-79B which crashed on its first flight due to no fault of the engines. Due to wartime secrecy, Westinghouse worked on its own, with no prior jet engine experience and without knowledge of German, British or other US jet engine developments. The basic principle of the engine was similar to the original Whittle engine developed in England, but Westinghouse’s use of an axial flow compressor, along with internal combustion chamber, were major advancements that led

16264-403: The right wing to stall at the same time as the left. Other problems were encountered during early carrier trials. The combination of an aft cockpit and the Corsair's long nose made landings hazardous for newly trained pilots because of the lack of visibility due to said features. During landing approaches, it was found that oil from the opened hydraulically powered cowl flaps could spatter onto

16416-504: The roll rate, with a consequent reduction in flap span. IFF transponder equipment was fitted in the rear fuselage. These changes increased the Corsair's weight by several hundred pounds. The performance of the Corsair was superior to most of its contemporaries. The F4U-1 was considerably faster than the Grumman F6F Hellcat and only 13 mph (21 km/h) slower than the Republic P-47 Thunderbolt . All three were powered by

16568-553: The same Double Wasp engine first flown on the Corsair's initial prototype in 1940. The Corsair's early deployment was to land-based squadrons of the U.S. Marine Corps and U.S. Navy. The Corsair served almost exclusively as a fighter-bomber throughout the Korean War and during the French colonial wars in Indochina and Algeria . In addition to its use by the U.S. and British, the Corsair

16720-661: The sea in Moreton Bay off Brisbane, Australia. Equipped with obsolescent Curtiss P-40s , Royal New Zealand Air Force (RNZAF) squadrons in the South Pacific performed impressively, in particular in the air-to-air role. The American government accordingly decided to give New Zealand early access to the Corsair, especially as it was not initially being used from carriers. Some 424 Corsairs equipped 13 RNZAF squadrons, including No. 14 Squadron RNZAF and No. 15 Squadron RNZAF , replacing Douglas SBD Dauntlesses as well as P-40s. Most of

16872-725: The series of attacks ( Operation Tungsten ) in April, July, and August 1944 on the German battleship  Tirpitz , for which Corsairs from HMS  Victorious and HMS  Formidable provided fighter cover. It appears the Corsairs did not encounter aerial opposition on these raids. From April 1944, Corsairs from the British Pacific Fleet took part in several major air raids in South East Asia beginning with Operation Cockpit , an attack on Japanese targets at Sabang island, in

17024-408: The single-engined fighter, the Navy requested the maximum obtainable speed, and a minimum stalling speed not higher than 70 miles per hour (110 km/h). A range of 1,000 miles (1,600 km) was specified. The fighter had to carry four guns, or three with increased ammunition. Provision had to be made for antiaircraft bombs to be carried in the wing. These small bombs would, according to thinking in

17176-499: The skinning for the top and bottom of each outer wing, aft of the main spar and armament bays, and for the ailerons , elevators , and rudder . The elevators were also constructed from plywood. The Corsair, even with its streamlining and high-speed abilities, could fly slowly enough for carrier landings with full flap deployment of 50°. In part because of its advances in technology and a top speed greater than existing Navy aircraft, numerous technical problems had to be solved before

17328-540: The subject. The following summary is gleaned from that paper as well as from the Tommy Thomason reference also cited. In March, 1943, the first US designed and manufactured jet engine went on test at Westinghouse, 15 months after the signing of a contract with the U.S. Navy Bureau of Aeronautics. This first engine, with a 19 in. intake diameter, was designated the Model 19A, had a thrust of 1130 lb. and weighed 827 lb. It had

17480-443: The tail dragging on the runway. The initial standard model was the 707-120 with JT3C turbojet engines. Qantas ordered a shorter-bodied version called the 707-138, which was a -120 with six fuselage frames removed, three in front of the wings, and three aft. The frames in the 707 were set 20 in (510 mm) apart, so this resulted in a shortening of 10 ft (3.0 m) to a length of 134 ft 6 in (41.0 m). With

17632-474: The three aircraft delivered to the USAF as -153s and the seven short-bodied Qantas -138s (making 13 total 707s delivered to Qantas between 1959 and 1964). The first flight of the -120B was on June 22, 1960, and American carried the first passengers in March 1961; the last delivery was to American in April 1969. Maximum weight was 258,000 lb (117,000 kg) for both the long- and short-bodied versions. The 707-220

17784-417: The throttle were suddenly advanced (for example, during an aborted landing ) the left wing could stall and drop so quickly that the fighter could flip over with the rapid increase in power. These potentially lethal characteristics were later solved through the addition of a small, 6 in (150 mm)-long stall strip to the leading edge of the outer right wing, just outboard of the gun ports. This allowed

17936-468: The time preferred the more established Douglas Aircraft as a maker of passenger aircraft, and several major carriers committed only to the Douglas DC-8, delayed by Douglas' decision to wait for the larger and more fuel efficient ( Pratt & Whitney JT4A ) turbojet to design a larger and longer range aircraft around. Anticipating this advantage, Boeing made a late and costly decision to redesign and enlarge

18088-477: The time the U.S. Navy removed the red-center from their roundel. Later, a shade of slate gray center color replaced the white color on the earlier roundel. When the Americans starting using the added white bars to either side of their blue/white star roundel on 28 June 1943; SEAC British Corsairs, most all of which still used the earlier blue/white Type C roundel with the red center removed, added similar white bars to either side of their blue-white roundels to emulate

18240-458: The total of 12,571. Other variants were capable of carrying mission specific weapons such as rockets and bombs. The F4U was able to carry up to a total of eight rockets, or four under each wing. It was able to carry up to four thousand pounds of explosive ordnance. This helped the Corsair take on a fighter bomber role, giving it a more versatile role as a ground support aircraft as well as a fighter. In addition, 150 lb (68 kg) of armor plate

18392-456: The turbine blades or by propeller slip stream on the ground. The engine was then modified into the Model 19B, which combined improved axial blade and stator design, a new annular combustion chamber and added a new accessories gearbox under the engine to drive airframe accessories such as hydraulics and a generator. The engine suffered from protracted problems with combustion hot spots and acceleration flat zones. Some Model 19B's were used to power

18544-744: The type until September 1943. The work done by the Royal Navy 's FAA meant those models qualified the type for U.S. carrier operations first. The U.S. Navy finally accepted the F4U for shipboard operations in April 1944, after the longer oleo strut was fitted, which eliminated the tendency to bounce. The first US Corsair unit to be based effectively on a carrier was the pioneer USMC squadron VMF-124 , which joined Essex in December 1944. They were accompanied by VMF-213 . The increasing need for fighter protection against kamikaze attacks resulted in more Corsair units being moved to carriers. U.S. figures compiled at

18696-402: The ventral fin to be removed (although the taller fin was retained). The 707-320Bs built after 1963 used the same wing as the -320C and were known as 707-320B Advanced aircraft. In total, 1,010 707s were built for civilian use between 1958 and 1978, though many of these found their way to military service. The 707 production line remained open for purpose-built military variants until 1991, with

18848-573: The way to a practical engine for aviation propulsion. (Earliest GE jet engines, based on the Whittle design and developed with Allison, featured a centrifugal compressor. GE and Allison had the Army contract to develop a ‘land based’ jet while the Westinghouse Navy contract was for carrier-based Navy jet fighters . ) One year later, an improved Model 19B, the 19XB-2B, changed to a 10 stage compressor. Under

19000-590: The wheel atop the lower end of the strut when retracted. A pair of rectangular doors enclosed each wheel well, leaving a streamlined wing. This swiveling, aft-retracting landing gear design was common to the Curtiss P-40 (and its predecessor, the P-36 ), as adopted for the F4U Corsair's main gear and its Pacific War counterpart, the Grumman F6F Hellcat . The oil coolers were mounted in the heavily anhedraled inboard section of

19152-422: The windscreen, severely reducing visibility, and the undercarriage oleo struts had bad rebound characteristics on landing, allowing the aircraft to bounce down the carrier deck. The first problem was solved by locking the top cowl flaps in front of the windscreen down permanently, then replacing them with a fixed panel. The undercarriage bounce took more time to solve, but eventually a "bleed valve" incorporated in

19304-414: The wing (from 138 ft 10 in (42.32 m) to 145 ft 6 in (44.35 m) ), with extensions to the fin and horizontal stabilizer extending the aircraft's length further. The longer wing carried more fuel, increasing range by 1,600 miles (2,600 km) and allowing the aircraft to operate as true transoceanic aircraft. The wing modifications included outboard and inboard inserts, as well as

19456-768: The wing, giving increased range. Maximum takeoff weight was the same 247,000 lb (112,000 kg) as the standard version. It was a variant for Qantas, thus had its customer number 38. To allow for full-load takeoffs at the midflight refueling stop in Fiji, the wing's leading-edge slats were modified for increased lift, and the allowable temperature range for use of full takeoff power was increased by 10°F (5.5°C). Seven -138s were delivered to Qantas between June and September 1959, and they first carried passengers in July of that year. The 707-120B had Pratt & Whitney JT3D-1 turbofan engines, which were quieter, more powerful, and more fuel-efficient, rated at 17,000 lbf (75.6 kN), with

19608-441: The wings, alongside the supercharger air intakes, and used openings in the leading edges of the wings, rather than protruding scoops. The large fuselage panels were made of aluminum and were attached to the frames with the newly developed technique of spot welding , thus mostly eliminating the use of rivets. While employing this new technology, the Corsair was also the last American-produced fighter aircraft to feature fabric as

19760-499: The yaw damper was turned off to familiarize the new pilots with flying techniques, a trainee pilot's actions violently exacerbated the Dutch roll motion and caused three of the four engines to be torn from the wings. The plane, a brand new 707-227, N7071 , destined for Braniff, crash-landed on a river bed north of Seattle at Arlington, Washington , killing four of the eight occupants. In his autobiography, test pilot Tex Johnston describes

19912-484: Was June 1962, with Pan Am. The 707-320B Advanced is an improved version of the -320B, adding the three-section leading-edge flaps already seen on the -320C. These reduced takeoff and landing speeds and altered the lift distribution of the wing, allowing the ventral fin found on earlier 707s to be removed. From 1965, -320Bs had the uprated -320C undercarriage allowing the same 335,000 lb (152,000 kg) MTOW. These were often identified as 707-320BA-H. The 707-320C has

20064-515: Was a better deck landing aircraft. The Corsair was declared "ready for combat" at the end of 1942, though qualified to operate only from land bases until the last of the carrier qualification issues were worked out. VF-17 went aboard the USS ; Bunker Hill in late 1943, and the Chief of Naval Operations wanted to equip four air groups with Corsairs by the end of 1943. The Commander, Air Forces, Pacific had

20216-488: Was a test aircraft used to study the feasibility of using CFM International CFM56 engines on a 707 airframe and possibly retrofitting existing aircraft with the engine. After testing in 1979, N707QT , the last commercial 707 airframe, was restored to 707-320C configuration and delivered to the Moroccan Air Force as a tanker aircraft via a "civilian" order. Boeing abandoned the retrofit program, since they felt it would be

20368-576: Was also used by the Royal New Zealand Air Force , French Naval Aviation , and other air forces until the 1960s. From the first prototype delivery to the U.S. Navy in 1940, to final delivery in 1953 to the French, 12,571 F4U Corsairs were manufactured in 16 separate models. Its 1942–1953 production run was the longest of any U.S. piston-engined fighter. In February 1938, the U.S. Navy Bureau of Aeronautics published two requests for proposal for twin-engined and single-engined fighters. For

20520-634: Was awarded the Navy Cross . At war's end, Corsairs were ashore on Okinawa , combating the kamikaze , and also were flying from fleet and escort carriers. VMF-312 , VMF-323 , and VMF-224 and some other Marine units met with success in the Battle of Okinawa . Since Corsairs were being operated from shore bases, while still awaiting approval for U.S. carrier operations, 965 FG-1As were built as "land planes" without their hydraulic wing folding mechanisms, hoping to improve performance by reducing aircraft weight, with

20672-425: Was delayed until late 1944, by which time the last of the carrier landing problems, relating to the Corsair's long nose, had been tackled by the British. Production F4U-1s featured several major modifications from the XF4U-1. A change of armament to six wing-mounted .50 in (12.7 mm) M2 Browning machine guns (three in each outer wing panel) and their ammunition (400 rounds for the inner pair, 375 rounds for

20824-401: Was designed for hot and high operations with more powerful 15,800 lbf (70.3 kN) Pratt & Whitney JT4A-3 turbojets. Five of these were produced, but only four were ultimately delivered, with one being lost during a test flight. All were for Braniff International Airways and carried the model number 707-227; the first entered service in December 1959. This version was made obsolete by

20976-459: Was designed for transcontinental routes, and often required a refueling stop when flying across the North Atlantic. It had four Pratt & Whitney JT3C-6 turbojets, civilian versions of the military J57, initially producing 13,000 lbf (57.8 kN) with water injection . Maximum takeoff weight was 247,000 lb (112,000 kg) and first flight was on December 20, 1957. Major orders were

21128-464: Was from Idlewild Airport , New York, to Le Bourget , Paris, on October 26, 1958, with a fuel stop in Gander, Newfoundland . In December, National Airlines operated the first US domestic jet airline flights between New York/Idlewild and Miami, using 707s leased from Pan Am. In February 1956, rival global giant Trans World Airlines' then-President Howard Hughes ordered eight new Boeing 707-120, dubbing

21280-414: Was heavier and more difficult to construct, however, offsetting these benefits. The Corsair's aerodynamics were an advance over those of contemporary naval fighters. The F4U was the first U.S. Navy aircraft to feature landing gear that retracted into a fully enclosed wheel well. The landing gear oleo struts —each with its own strut door enclosing it when retracted—rotated through 90° during retraction, with

21432-417: Was hit by flak but pressed home his attack on the Japanese destroyer escort Amakusa , sinking it with a 1,000 lb (450 kg) bomb but crashing into the sea. He was posthumously awarded Canada's last Victoria Cross , becoming the second fighter pilot of the war to earn a Victoria Cross as well as the final Canadian casualty of World War II. FAA Corsairs originally fought in a camouflage scheme with

21584-402: Was installed, along with a 1.5 in (38 mm) bullet-proof windscreen which was set internally, behind the curved Plexiglas windscreen. The canopy could be jettisoned in an emergency, and half-elliptical planform transparent panels, much like those of certain models of the Curtiss P-40 , were inset into the sides of the fuselage's turtledeck structure behind the pilot's headrest, providing

21736-486: Was insufficient. The U.S. Navy 's November 1940 production proposals specified heavier armament. The increased armament comprised three .50 caliber machine guns mounted in each wing panel. This improvement greatly increased the ability of the Corsair to shoot down enemy aircraft. Formal U.S. Navy acceptance trials for the XF4U-1 began in February 1941. The Navy entered into a letter of intent on 3 March 1941, received Vought's production proposal on 2 April, and awarded Vought

21888-486: Was known for its military aircraft. The company had produced innovative and important bombers, from the B-17 Flying Fortress and B-29 Superfortress to the jet-powered B-47 Stratojet and B-52 Stratofortress , but its commercial aircraft were not as successful as those from Douglas Aircraft and other competitors. As Douglas and Lockheed dominated the postwar air transport boom, the demand for Boeing's offering,

22040-687: Was made when the elevator trim tabs failed because of flutter. On 1 October 1940, the XF4U-1 became the first single-engined U.S. fighter to fly faster than 400 mph (640 km/h) by flying at an average ground speed of 405 mph (652 km/h) from Stratford to Hartford . The USAAC 's twin engine Lockheed P-38 Lightning had flown over 400 mph in January–February 1939. The XF4U-1 also had an excellent rate of climb, although testing revealed some requirements would have to be rewritten. In full-power dive tests, speeds up to 550 mph (890 km/h) were achieved, but not without damage to

22192-482: Was not ideally suited for operations with the USAF's new fleets of jet-powered fighters and bombers; this was where Boeing's new design would win military orders. As the first of a new generation of American passenger jets, Boeing wanted the aircraft's model number to emphasize the difference from its previous propeller-driven aircraft, which bore 300-series numbers. The 400-, 500- and 600-series were already used by their missiles and other products, so Boeing decided that

22344-404: Was on 14 February 1943, when Corsairs of VMF-124 under Major Gise assisted P-40s and P-38s in escorting a formation of Consolidated B-24 Liberators on a raid against a Japanese aerodrome at Kahili . Japanese fighters contested the raid and the Americans got the worst of it, with four P-38s, two P-40s, two Corsairs, and two Liberators lost. No more than four Japanese Zeros were destroyed. A Corsair

22496-543: Was powered by Pratt & Whitney JT3C turbojet engines. The JT3D-3B engines are readily identifiable by the large gray secondary-air inlet doors in the nose cowl. These doors are fully open (sucked in at the rear) during takeoff to provide additional air. The doors automatically close with increasing airspeed. The 707 was the first commercial jet aircraft to be fitted with clamshell-type thrust reversers . The 707 uses engine-driven turbocompressors to supply compressed air for cabin pressurization . On many commercial 707s,

22648-454: Was responsible for one of the kills, albeit due to a midair collision. The fiasco was referred to as the "Saint Valentine's Day Massacre". Despite the debut, the Marines quickly learned how to make better use of the aircraft and started demonstrating its superiority over Japanese fighters. By May, the Corsair units were getting the upper hand, and VMF-124 had produced the first Corsair ace, Second Lieutenant Kenneth A. Walsh , who would rack up

22800-483: Was scored by Marine Lieutenant R. R. Klingman of VMF-312 (the "Checkerboards") over Okinawa. Klingman was in pursuit of a Japanese twin-engine aircraft at high altitude when his guns jammed due to the gun lubrication thickening from the extreme cold. He flew into and chopped off the enemy's tail with the large propeller of the Corsair. Despite smashing five inches (130 mm) off the end of his propeller blades, he managed to land safely after this aerial ramming attack. He

22952-613: Was then relocated to 2 SU on Bougainville in November. In all there were ten front line SUs plus another three based in New Zealand. Because each of the SUs painted its aircraft with distinctive markings and the aircraft themselves could be repainted in several different color schemes, the RNZAF Corsairs were far less uniform in appearance than their American and FAA contemporaries. By late 1944,

23104-582: Was to be powered by four 22,500-pound-force thrust (100 kN) Pratt & Whitney JT3D-15 turbofan engines, and it would have had a nearly 10-foot (3.0 m) extension in wingspan, to 155.5 feet (47.4 m). Two variations were proposed, the 707-820(505) model and the 707-820(506) model. The 505 model would have had a fuselage 45 feet (14 m) longer than the 707-320B, for a total length of 198.6 feet (60.5 m). This model would have carried 209 passengers in mixed-class configuration and 260 passengers in all-economy configuration. The 506 model would have had

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