Ya-21 | |
---|---|
Role | single-seat fighter-trainer / high-speed sport aircraft |
National origin | USSR |
Manufacturer | OKB Yakovlev |
First flight | September 1937 |
Number built | 1 |
Developed from | Yakovlev UT-1 |
The Yakovlev Ya-21, (aka UT-21, No.21 or No.25), was a single-seat high-speed sport aircraft / fighter-trainer designed and built in the Soviet Union in the late 1930s.
The Ya-21 was derived from the Yakovlev UT-1, in similar fashion to the Yakovlev AIR-18, by replacing the Shvetsov M-11 radial with an imported 220 hp (160 kW) Renault 6Q-01 inverted 6-cylinder in-line engine. The rear cockpit was enclosed with an aft-sliding canopy, a fixed trousered and spatted undercarriage with spring steel tail-skid was fitted, as well as split flaps and a fixed, forward firing, synchronised 7.62mm ShKAS machine gun in the forward fuselage decking. Plans for re-engining the Ya-25 with a Kossov MG-31F 9-cylinder radial engine were cancelled, due to changing priorities of the customer. [1] [2]
The sole Ya-21 was converted into the No.25 prototype by substituting the imported Renault with a 220 hp (160 kW) Voronezh MV-6 (Renault Bengali copy). The cockpit also differed in having opaque side panels and no sliding hood, with a deeper windshield to house the gunsight. [1]
Production of both the Ya-21 or No.25 was not implemented due to the Yakovlev OKB focusing on combat aircraft, such as the Yakovlev BB-22 and Yakovlev I-26. [1]
Data from OKB Yakovlev, [1] Yakovlev aircraft since 1924 [2]
General characteristics
Performance
Armament
The Yakovlev UT-2 is a single-engine tandem two-seat low-wing monoplane that was the standard Soviet trainer during World War II. It was used by the Soviet Air Force from 1937 until replaced by the Yakovlev Yak-18 during the 1950s.
The Yakovlev UT-1 was a single-seater trainer aircraft used by the Soviet Air Force from 1937 until the late 1940s.
The Yakovlev Yak-25 was a Soviet military aircraft, an early turbojet-powered fighter aircraft designed by the Yakovlev OKB. The designation was later reused for a different interceptor design. Tasked by the Council of Ministers in a directive issued on 11 March 1947, with producing a straight winged fighter similar to the earlier Yak-19, but powered by a Rolls-Royce Derwent V, OKB-115 swiftly produced the Yak-25, which blazed several trails as the first Soviet fighter with a fully pressurised cockpit, air conditioning, jettisonable canopy, and hydraulic airbrakes on the fuselage amongst other innovations.
The Caudron Simoun was a 1930s French four-seat touring monoplane. It was used as a mail plane by Air Bleu, flew record-setting long-range flights, and was also used as a liaison aircraft by the Armée de l'Air during World War II. The aircraft later was used as an inspiration to the famous Mooney "M series" aircraft by Jacques "Strop" Carusoam.
The Yakovlev Yak-30 was an experimental Soviet interceptor from the late 1940s. Derived from the Yak-25, from which it differed primarily in having wings sweptback 35° at quarter chord, the Yak-30 retained the fuselage, tail surfaces and undercarriage of the earlier fighter.
The Hanriot H.230 was a French twin-engined advanced trainer. The construction of the aircraft was initiated in 1936 by Hanriot's chief designer Montlaur. The aircraft was produced by the nationalized factory SNCAC.
The Farman F.430 was a 1930s French light transport designed and built by the Farman Aviation Works. Two variants with different engines were known as the F.431 and F.432.
The Yakovlev EG (Eksperimentalnyi Gelikopter), also commonly known as the Yak-M11FR-1 and Sh (Shootka), was an experimental aircraft with coaxial rotors. The prototype was first flown by V.V. Tezavrovsky in December 1947.
The Yakovlev Yak-20 was an experimental piston-engined trainer developed in the Soviet Union in 1949. It did not go into production.
The Yakovlev Yak-53 was a single seat aerobatic trainer aircraft produced in the USSR during 1981/2. Only one prototype was produced.
The Yakovlev Yak-5 was an experimental trainer aircraft designed by Yakovlev OKB in the Soviet Union, and first flown in 1944.
The Yakovlev UT-3, initially known as the AIR-17 and then Ya-17, was a twin-engine low-wing monoplane aircraft designed by Alexander Sergeyevich Yakovlev for the Soviet Air Force (VVS).
The Yakovlev AIR-6 was a Soviet light utility aircraft of the 1930s. It was a single-engined high-wing monoplane designed by Alexander Sergeyevich Yakovlev, with 128 being built.
The Yakovlev Ya-19,, was a 5-seat light transport aircraft developed directly from the Yakovlev UT-3 during the late 1930s. The Ya-19 did not enter production, despite positive results from flight trials, due to the lack of development of the UT-3 and cancellation of the Voronezh MV-6 engine program, which were the result of changing priorities in the face of the Great Patriotic War.
The SFCA Lignel 20 was a French, single engine, low wing monoplane, one of a series of this type built by SFCA in the 1930s. It was capable of aerobatics but was primarily a racing aircraft.
The SFCA Lignel 10 was a French single seat aircraft designed to bridge a training gap between basic trainers and front-line fighters. The military requirement was soon dropped and only one was built.
TheYakovlev AIR-9 / AIR-9bis was a 2-seat sport aircraft designed and built in the USSR during the early 1930s.
The Yakovlev AIR-12 was a long-range sport aircraft designed and built in the Soviet Union during the late 1930s.
The Yakovlev AIR-11, also known as Yakovlev LT-1, was a 3-seat low-wing touring cabin monoplane designed by A.S. Yakovlev in the USSR, circa 1936.
The Dewoitine D.720 T3 was a French reconnaissance/cooperation aircraft built by Dewoitine in the late 1930s.