46-498: The Cessna 408 SkyCourier is an American utility aircraft designed and built by the Cessna division of Textron Aviation . It was launched on November 28, 2017, with an order for 50 from FedEx Express , with the aircraft designed for the needs of its FedEx Feeder service. It made its first flight on May 17, 2020, and was type certified on March 11, 2022. FedEx took delivery of the first production model on May 9, 2022. The SkyCourier
92-400: A Pratt & Whitney Canada PT6 , and an under-speed governor on a Honeywell TPE331 . The turboprop is also distinguished from other kinds of turbine engine in that the fuel control unit is connected to the governor to help dictate power. To make the engine more compact, reverse airflow can be used. On a reverse-flow turboprop engine, the compressor intake is at the aft of the engine, and
138-415: A turbojet or turbofan , the engine's exhaust gases do not provide enough power to create significant thrust, since almost all of the engine's power is used to drive the propeller. Exhaust thrust in a turboprop is sacrificed in favor of shaft power, which is obtained by extracting additional power (beyond that necessary to drive the compressor) from turbine expansion. Owing to the additional expansion in
184-407: A "large cargo door and a flat floor cabin". Its cruise speed is up to 200 kn (370 km/h; 230 mph), with a maximum range of 900 nmi (1,700 km; 1,000 mi). Single-point refueling will speed turnarounds . The aircraft was designed to offer better cabin flexibility and payload capability, superior performance and lower operating costs than its competitors; notably, the cabin
230-510: A bombing raid. In 1941, the engine was abandoned due to war, and the factory converted to conventional engine production. The first mention of turboprop engines in the general public press was in the February 1944 issue of the British aviation publication Flight , which included a detailed cutaway drawing of what a possible future turboprop engine could look like. The drawing was very close to what
276-442: A governor, and overspeed governor, and a fuel-topping governor. The governor works in much the same way a reciprocating engine propeller governor works, though a turboprop governor may incorporate beta control valve or beta lift rod for beta operation and is typically located in the 12 o'clock position. There are also other governors that are included in addition depending on the model, such as an overspeed and fuel topping governor on
322-410: A mode typically consisting of zero to negative thrust, is used for all ground operations aside from takeoff. The Beta mode is further broken down into 2 additional modes, Beta for taxi and Beta plus power. Beta for taxi as the name implies is used for taxi operations and consists of all pitch ranges from the lowest alpha range pitch, all the way down to zero pitch, producing very little to zero-thrust and
368-411: A range of 386 nautical miles (715 km; 444 mi) with 19 passengers. The passenger version is outfitted as a combi aircraft that can be rapidly converted to an all-freight configuration. The Model 408 was launched on November 28, 2017, by Textron Aviation , with an introduction planned for 2020, as a FAR Part 23 type certified design. Like the earlier Cessna 208 Caravan , the 408's design
414-581: A small amount of air by a large degree, a low disc loading (thrust per unit disc area) increases the aircraft's energy efficiency , and this reduces the fuel use. Propellers work well until the flight speed of the aircraft is high enough that the airflow past the blade tips reaches the speed of sound. Beyond that speed, the proportion of the power that drives the propeller that is converted to propeller thrust falls dramatically. For this reason turboprop engines are not commonly used on aircraft that fly faster than 0.6–0.7 Mach , with some exceptions such as
460-575: A test-bed not intended for production. It first flew on 20 September 1945. From their experience with the Trent, Rolls-Royce developed the Rolls-Royce Clyde , the first turboprop engine to receive a type certificate for military and civil use, and the Dart , which became one of the most reliable turboprop engines ever built. Dart production continued for more than fifty years. The Dart-powered Vickers Viscount
506-555: Is a general-purpose light airplane or helicopter , usually used for transporting people, freight, or other supplies, but also used for other duties when more specialized aircraft are not required or available. The term can also refer to an aircraft type certificated under American, Canadian, European, or Australian regulations as a Utility Category Aircraft , which indicates that it is permitted to conduct limited aerobatics . The approved maneuvers include chandelles , lazy eights , spins , and steep turns over 60° of bank. In
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#1732894922442552-414: Is a twin- turboprop , high-wing aircraft, available with a 19-passenger accommodation, or in a cargo variant sized for three LD3 sized unit load devices . The non- pressurized design is built from aluminum and is equipped with Pratt & Whitney Canada PT6A engines and fixed landing gear . The 19,000-pound (8,600 kg) MTOW airplane can cruise up to 210 knots (390 km/h; 240 mph), with
598-407: Is that it can also be used to generate reverse thrust to reduce stopping distance on the runway. Additionally, in the event of an engine failure, the propeller can be feathered , thus minimizing the drag of the non-functioning propeller. While the power turbine may be integral with the gas generator section, many turboprops today feature a free power turbine on a separate coaxial shaft. This enables
644-421: Is typically accessed by moving the power lever to a beta for taxi range. Beta plus power is a reverse range and produces negative thrust, often used for landing on short runways where the aircraft would need to rapidly slow down, as well as backing operations and is accessed by moving the power lever below the beta for taxi range. Due to the pilot not being able to see out of the rear of the aircraft for backing and
690-616: The P-3 Orion , and the C-130 Hercules military transport aircraft. The first turbine-powered, shaft-driven helicopter was the Kaman K-225 , a development of Charles Kaman 's K-125 synchropter , which used a Boeing T50 turboshaft engine to power it on 11 December 1951. December 1963 saw the first delivery of Pratt & Whitney Canada's PT6 turboprop engine for the then Beechcraft 87, soon to become Beechcraft King Air . 1964 saw
736-830: The Piper Meridian , Socata TBM , Pilatus PC-12 , Piaggio P.180 Avanti , Beechcraft King Air and Super King Air . In April 2017, there were 14,311 business turboprops in the worldwide fleet. Between 2012 and 2016, the ATSB observed 417 events with turboprop aircraft, 83 per year, over 1.4 million flight hours: 2.2 per 10,000 hours. Three were "high risk" involving engine malfunction and unplanned landing in single‑engine Cessna 208 Caravans , four "medium risk" and 96% "low risk". Two occurrences resulted in minor injuries due to engine malfunction and terrain collision in agricultural aircraft and five accidents involved aerial work: four in agriculture and one in an air ambulance . Jane's All
782-590: The Tupolev Tu-114 can reach 470 kn (870 km/h; 540 mph). Large military aircraft , like the Tupolev Tu-95 , and civil aircraft , such as the Lockheed L-188 Electra , were also turboprop powered. The Airbus A400M is powered by four Europrop TP400 engines, which are the second most powerful turboprop engines ever produced, after the 11 MW (15,000 hp) Kuznetsov NK-12 . In 2017,
828-403: The Tupolev Tu-95 . However, propfan engines, which are very similar to turboprop engines, can cruise at flight speeds approaching 0.75 Mach. To maintain propeller efficiency across a wide range of airspeeds, turboprops use constant-speed (variable-pitch) propellers. The blades of a constant-speed propeller increase their pitch as aircraft speed increases. Another benefit of this type of propeller
874-519: The Soviet Union had the technology to create the airframe for a jet-powered strategic bomber comparable to Boeing's B-52 Stratofortress , they instead produced the Tupolev Tu-95 Bear, powered with four Kuznetsov NK-12 turboprops, mated to eight contra-rotating propellers (two per nacelle) with supersonic tip speeds to achieve maximum cruise speeds in excess of 575 mph, faster than many of
920-470: The United States, military utility aircraft are given the prefix U in their designations . This aircraft-related article is a stub . You can help Misplaced Pages by expanding it . Turboprop A turboprop is a turbine engine that drives an aircraft propeller . A turboprop consists of an intake , reduction gearbox , compressor , combustor , turbine , and a propelling nozzle . Air enters
966-414: The amount of debris reverse stirs up, manufacturers will often limit the speeds beta plus power may be used and restrict its use on unimproved runways. Feathering of these propellers is performed by the propeller control lever. The constant-speed propeller is distinguished from the reciprocating engine constant-speed propeller by the control system. The turboprop system consists of 3 propeller governors ,
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#17328949224421012-407: The exhaust is situated forward, reducing the distance between the turbine and the propeller. Unlike the small-diameter fans used in turbofan engines, the propeller has a large diameter that lets it accelerate a large volume of air. This permits a lower airstream velocity for a given amount of thrust. Since it is more efficient at low speeds to accelerate a large amount of air by a small degree than
1058-493: The first jet aircraft and comparable to jet cruising speeds for most missions. The Bear would serve as their most successful long-range combat and surveillance aircraft and symbol of Soviet power projection through to the end of the 20th century. The USA used turboprop engines with contra-rotating propellers, such as the Allison T40 , on some experimental aircraft during the 1950s. The T40-powered Convair R3Y Tradewind flying-boat
1104-594: The first aircraft was completed in December 2019. By March 2020, initial ground testing was completed, checking the fuel system, engines, avionics interfaces and electrical systems. The first flight was completed on May 17, 2020, operating from Beech Factory Airport for a 2-hour and 15-minute flight. The prototype aircraft, along with five additional flight and ground test articles, will be used for testing leading to certification. The second prototype, which first flew in August 2020,
1150-546: The first deliveries of the Garrett AiResearch TPE331 , (now owned by Honeywell Aerospace ) on the Mitsubishi MU-2 , making it the fastest turboprop aircraft for that year. In contrast to turbofans , turboprops are most efficient at flight speeds below 725 km/h (450 mph; 390 knots) because the jet velocity of the propeller (and exhaust) is relatively low. Modern turboprop airliners operate at nearly
1196-458: The future Rolls-Royce Trent would look like. The first British turboprop engine was the Rolls-Royce RB.50 Trent , a converted Derwent II fitted with reduction gear and a Rotol 7 ft 11 in (2.41 m) five-bladed propeller. Two Trents were fitted to Gloster Meteor EE227 — the sole "Trent-Meteor" — which thus became the world's first turboprop-powered aircraft to fly, albeit as
1242-417: The intake and is compressed by the compressor. Fuel is then added to the compressed air in the combustor, where the fuel-air mixture then combusts . The hot combustion gases expand through the turbine stages, generating power at the point of exhaust. Some of the power generated by the turbine is used to drive the compressor and electric generator . The gases are then exhausted from the turbine. In contrast to
1288-657: The most widespread turboprop airliners in service were the ATR 42 / 72 (950 aircraft), Bombardier Q400 (506), De Havilland Canada Dash 8 -100/200/300 (374), Beechcraft 1900 (328), de Havilland Canada DHC-6 Twin Otter (270), Saab 340 (225). Less widespread and older airliners include the BAe Jetstream 31 , Embraer EMB 120 Brasilia , Fairchild Swearingen Metroliner , Dornier 328 , Saab 2000 , Xian MA60 , MA600 and MA700 , Fokker 27 and 50 . Turboprop business aircraft include
1334-596: The passenger version is designed for quick conversion to a freight configuration; using patented quick-release fixtures, two people can remove the passenger seats and interior bulkheads in about one hour. As of January 2024, a total of 33 model 408s were registered in the United States with the Federal Aviation Administration . Data from Cessna. General characteristics Performance Aircraft of comparable role, configuration, and era Utility aircraft A utility aircraft
1380-485: The power section (turbine and gearbox) to be removed and replaced in such an event, and also allows for less stress on the start during engine ground starts. Whereas a fixed shaft has the gearbox and gas generator connected, such as on the Honeywell TPE331 . The propeller itself is normally a constant-speed (variable pitch) propeller type similar to that used with larger aircraft reciprocating engines , except that
1426-522: The propeller to rotate freely, independent of compressor speed. Alan Arnold Griffith had published a paper on compressor design in 1926. Subsequent work at the Royal Aircraft Establishment investigated axial compressor-based designs that would drive a propeller. From 1929, Frank Whittle began work on centrifugal compressor-based designs that would use all the gas power produced by the engine for jet thrust. The world's first turboprop
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1472-403: The propeller-control requirements are very different. Due to the turbine engine's slow response to power inputs, particularly at low speeds, the propeller has a greater range of selected travel in order to make rapid thrust changes, notably for taxi, reverse, and other ground operations. The propeller has 2 modes, Alpha and Beta. Alpha is the mode for all flight operations including takeoff. Beta,
1518-585: The same speed as small regional jet airliners but burn two-thirds of the fuel per passenger. Compared to piston engines, their greater power-to-weight ratio (which allows for shorter takeoffs) and reliability can offset their higher initial cost, maintenance and fuel consumption. As jet fuel can be easier to obtain than avgas in remote areas, turboprop-powered aircraft like the Cessna Caravan and Quest Kodiak are used as bush airplanes . Turboprop engines are generally used on small subsonic aircraft, but
1564-499: The three test aircraft had accumulated over 2,100 flight hours as the first production aircraft for FedEx was rolled out on February 3, 2022. Cessna was aiming for certification in the first half of the year before first delivery later in 2022. Federal Aviation Administration type certification was granted on March 11, 2022, after 2,100 hours of flight tests. Certification by the National Civil Aviation Agency of Brazil
1610-406: The turbine system, the residual energy in the exhaust jet is low. Consequently, the exhaust jet produces about 10% of the total thrust. A higher proportion of the thrust comes from the propeller at low speeds and less at higher speeds. Turboprops have bypass ratios of 50–100, although the propulsion airflow is less clearly defined for propellers than for fans. The propeller is coupled to
1656-471: The turbine through a reduction gear that converts the high RPM /low torque output to low RPM/high torque. This can be of two primary designs, free-turbine and fixed. A free-turbine turboshaft found on the Pratt & Whitney Canada PT6 , where the gas generator is not connected to the propeller. This allows for propeller strike or similar damage to occur without damaging the gas generator and allowing for only
1702-568: Was delivered in April 2023 for use by Western Aircraft, Inc. doing business in Hawaii as Lāna’i Air. In 2024, the price was $ 8.35M for the passenger variant and $ 7.75M for the cargo variant. The SkyCourier is a twin- turboprop , high-wing, utility aircraft . It is available in a 19-passenger variant with large cabin windows and separate crew and passenger doors, or in a cargo variant sized for three LD3s and 6,000 lb (2,700 kg) of payload, featuring
1748-557: Was designed by the Hungarian mechanical engineer György Jendrassik . Jendrassik published a turboprop idea in 1928, and on 12 March 1929 he patented his invention. In 1938, he built a small-scale (100 Hp; 74.6 kW) experimental gas turbine. The larger Jendrassik Cs-1 , with a predicted output of 1,000 bhp, was produced and tested at the Ganz Works in Budapest between 1937 and 1941. It
1794-461: Was designed to accommodate heavier and bulkier cargo than comparable new aircraft. The airframe consists of traditional aluminum materials and is equipped with proven Pratt & Whitney Canada PT6A -65 engines, fixed landing gear and Garmin G1000 avionics. The non- pressurized cabin is 70 in (178 cm) tall and wide, with a flat floor and an 87 in (221 cm) cargo door. The cabin of
1840-512: Was developed with FedEx Express to match the needs of FedEx Feeder service; FedEx requested an aircraft that could haul 6,000 lb (2,700 kg), twice the payload of the 208, and could accommodate entire LD3 sized unit load devices . FedEx Express was the launch customer, with an order of "50 cargo aircraft and options for 50 more". Its unit cost then was $ 5.5 million. Initial wind tunnel tests were completed in March 2018. The first flight
1886-544: Was granted on August 8, 2023. The first production aircraft was delivered to FedEx Express in May 2022. Mountain Air Cargo , which operates flights for FedEx, operated the first revenue flight of the type on January 3, 2023. In February 2023, a gravel runway operations kit was approved for the aircraft. In 2023, its equipped price was $ 7.195M for the freighter and $ 7.745M for the passenger version. The first 19-seat passenger variant
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1932-460: Was of axial-flow design with 15 compressor and 7 turbine stages, annular combustion chamber. First run in 1940, combustion problems limited its output to 400 bhp. Two Jendrassik Cs-1s were the engines for the world's first turboprop aircraft – the Varga RMI-1 X/H . This was a Hungarian fighter-bomber of WWII which had one model completed, but before its first flight it was destroyed in
1978-635: Was operated by the U.S. Navy for a short time. The first American turboprop engine was the General Electric XT31 , first used in the experimental Consolidated Vultee XP-81 . The XP-81 first flew in December 1945, the first aircraft to use a combination of turboprop and turbojet power. The technology of Allison's earlier T38 design evolved into the Allison T56 , used to power the Lockheed Electra airliner, its military maritime patrol derivative
2024-452: Was originally planned for 2019 and first deliveries anticipated in 2020. FedEx initially planned to take monthly deliveries over four years starting in 2020, and a similar pace for a second batch, if it agrees to that option. A full-scale mockup of the 19-passenger cabin was displayed at the October 2018 National Business Aviation Association convention. The mating of the wing and fuselage of
2070-603: Was the first production-conforming aircraft and was used for testing the engines, propellers, environmental controls and avionics . A third test aircraft first flew in September 2020. In April 2021, the company anticipated that certification would be completed by year's end and initial deliveries would occur in spring/summer 2022. The SkyCourier made its first public appearance at the EAA AirVenture in Oshkosh in 2021. By early 2022,
2116-593: Was the first turboprop aircraft of any kind to go into production and sold in large numbers. It was also the first four-engined turboprop. Its first flight was on 16 July 1948. The world's first single engined turboprop aircraft was the Armstrong Siddeley Mamba -powered Boulton Paul Balliol , which first flew on 24 March 1948. The Soviet Union built on German World War II turboprop preliminary design work by Junkers Motorenwerke, while BMW, Heinkel-Hirth and Daimler-Benz also worked on projected designs. While
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