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20-582: Jaktfalken was constructed and manufactured by Svenska Aero as a private venture, internally designated the SA-11 for the initial variant. The company contacted the Swedish Aerial board, requesting guidelines and wishes for a fighter aircraft. When no reply was received, Svenska Aero began to look at foreign designs to get some guidance. Jaktfalken was a conventional biplane equipped with an Armstrong Siddeley Jaguar 500 hp 14-cylinder radial engine . The landing gear

40-621: A Hawker Fury . When the Swedish Air Force wanted an additional seven aircraft in 1933, Svenska Aero had been bought by ASJA and the deliveries come from the new manufacturer, who made some minor modifications to the stabilizer and the windshield. The series produced aircraft was to be called J 6 in Swedish service. After the Swedish Air Force bought a Svenska Aero Jaktfalken J 5 in 1930 Flygstyrelsen (The Swedish Air Board) decided to use

60-498: A battalion . The term is often used to refer to a unit that is assigned to a different base from the parent unit. An example is the United States Army 's 1st Special Forces Operational Detachment-Delta (Airborne) (SFOD-D), commonly known as Delta Force by the general public. Detachment is also the term used as the collective noun for personnel manning an artillery piece (e.g. gun detachment). The Army Cadet Force in

80-581: A detachment ) to Svea Wing (F 8) in October 1938, there were seven J 6's left in the air force, they were used as fighter trainers. Three aircraft were given to Finland during the Winter War 1939–1940, all the remaining aircraft were scrapped in 1941. Sweden gave three Jaktfalkens (two J 6Bs and one J 6A) to the Finnish Air Force on 8 December 1939. These were the oldest ones of the type that Sweden had; it

100-473: A Bristol Jupiter as the standard engine. Two J 5s were already ordered but were not ready for delivery. The designer, Carl Clemens Bücker, was forced to reconstruct the aircraft from the firewall forward to make room for the new engine. The modified aircraft was given the designation J 6. Svenska Aero wanted more orders of the type in order to bring down the cost and rationalize production. Flygstyrelsen then suggested that another four J 6s should be bought for

120-673: Is an aircraft engine developed by Armstrong Siddeley . The Jaguar was a petrol -fuelled air-cooled 14-cylinder two-row radial engine design. The Jaguar III was first used in 1923, followed in 1925 by the Jaguar IV and in 1927 by the Jaguar VI. In 1925 the Jaguar became the first production aero engine incorporating a geared supercharger . The Jaguar was developed from the Royal Aircraft Factory RAF.8 design proposal of 1916. The RAF.8

140-566: Is on public display at the Science Museum (London) . Data from Lumsden Related development Comparable engines Related lists Detachment (military) A detachment (from the French détachement ) is a military unit . It can either be detached from a larger unit for a specific function or (particularly in United States military usage) be a permanent unit smaller than

160-454: The Barkarby air force base. After one of his landings, he said, "this is the best aircraft that I have flown so far." On November 11, 1929, Jaktfalken was presented for representatives from authorities and the press. The Swedish Air administration decided that three Jaktfalken and three British Bristol Bulldog II fighters were to be ordered for comparative tests. The prototype was bought by

180-448: The Swedish Air Force on January 9, 1930 for 81,654 Norwegian krone , and given the designation J 5 . By February 1930, the Air administration decided to use a Bristol Jupiter engine as the air force standard engine. The designer, Carl Clemens Bücker was forced to modify the two ordered aircraft, by making new engine attachments and make modifications to the fuselage. These aircraft were given

200-458: The RAF.8 and focus efforts to get the unreliable Siddeley Puma into effective service, an engine that had been ordered in large numbers despite a lack of testing. As a result, the RAF.8 design, then known as the Jaguar, was not run until 21 June 1922. Initial performance was not as expected; as a result the stroke was increased to 5.5 in (139.7 mm) on all variants after the Jaguar I. By that time,

220-514: The Swedish Air Force. The first J 6 was flown in 1930, at the test flight, the aircraft suffered from heavy vibrations in the tail section. The aircraft was then transferred to the CFV where they tried to modify the construction to reduce the vibrations. Although the problems weren't solved by the modifications, the aircraft was approved by the air force. The third aircraft was ready in the autumn of 1930. This aircraft had similar problems with vibrations as

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240-450: The aircraft's fuselage and gave it a new landing gear and Jupiter VIIF engine. The Swedish Air Force ordered 3 aircraft of this modified type and gave them the designation J 6A . These aircraft were delivered during the summer of 1932 and they were stationed at the F 3 Malmslätt air force base. All J 6's were transferred between 1932 and 1934 to F 1, in order to be used for fighter training. Another seven aircraft were ordered by May 1933 but

260-473: The company had been merged in 1932 with ASJ. The aircraft was thereafter produced and delivered by ASJA. As soon as the order had been received, manufacture began. The first aircraft was ready by November 1934. All aircraft were ready and were delivered by June 1935. The Swedish Air Force designated these aircraft J 6B . When all fighters were transferred from the Västmanland Wing (F 1) (where F 8 had been

280-501: The engine had been fitted with a gear-driven supercharger . Throughout its career the Jaguar suffered from vibration due to the lack of a crankshaft centre bearing. The most powerful version of the engine, the Jaguar VIC, produced a maximum of 490 hp (365 kW) on takeoff at 1,950 rpm and weighed 910 lb (413 kg). The later Lynx was designed using one row of Jaguar cylinders. A preserved Armstrong Siddeley Jaguar

300-468: The first prototype. The aircraft crashed during the first flight and the test pilot died. This test pilot was Einar Lundborg , a national hero, who had rescued the Arctic explorer Umberto Nobile . The accident caused a major storm against the leadership of the Swedish Air Force. The accident was investigated by a commission. Two J 5s and five J 6s were transferred to the Swedish Air Force. Bücker later modified

320-514: The landing gear and the fuselage after the delivery. The aircraft had now a more angular fuselage and the Jupiter VIIF was chosen as the engine. The Swedish Air Force received three Jaktfalken IIs in 1932. Argentine and Japanese military representatives tested the aircraft but placed no orders. The sole export order would be from Norway , who ordered one aircraft in 1931, equipped with an Armstrong Siddeley Panther IIIA engine to compare against

340-501: The name SA-14 Jaktfalken I (or J 6 in the Swedish Air Force). The order was followed by a new one for 5 aircraft with Jupiter VII engines in 1930, designated SA-14 Jaktfalken II (or J 6A in the Swedish Air Force). During test flights, powerful vibrations were encountered. Both Svenska Aero and CFV tried to solve the problem, without success. The aircraft was still approved by the Swedish Air Force. Bücker and CFV tried to modify

360-474: Was common to give away the oldest equipment as military aid. The aircraft were designated the two-letter code JF (for Jakt-Falken , numbers JF-219 , JF-224 and JF-228 , the latter two being J 6Bs) and were used for training at the airfield at Kauhava until 1945, when all were scrapped. Data from Complete Book of Fighters General characteristics Performance Armament Armstrong Siddeley Jaguar The Armstrong Siddeley Jaguar

380-406: Was fixed and there was a skid under the tail. The fuselage framework was made of welded beams covered with fabric. The fore and aft part of the fuselage was covered in aluminium sheet . There was a fuel tank between the engine and the cockpit, which contained enough fuel for 2.5 hours of flying. The Swedish Air Force test pilot Nils Söderberg was given the mission to try out the new prototype at

400-660: Was the work of a design team led by F.M. Green, and incorporated the findings of research into aluminium air-cooled cylinders by Samuel D. Heron and Professor A. H. Gibson. Disillusioned by political and press criticism of the Royal Air Factory, Green and his design team, including Heron, left the Factory in January 1917 and took up positions with the Siddeley-Deasy company. There they were required by official policy to suspend work on

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