| Yakovlev EG / Sh / Yak-M11FR-1 | |
|---|---|
 | |
| Role | Experimental helicopter |
| Manufacturer | Yakovlev |
| First flight | 1947 |
| Number built | 1 |
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 fuselage of the EG was a welded steel tube truss with duralumin skinning on the fwd fuselage back to the rear of the engine compartment. The rear fuselage was fabric covered and supported a tailplane-style unit with twin endplate fins, as well as a tailskid. The Pilot and Passenger sat side by side under a glazed canopy with a car-style door on each side. [1]
The M-11FR engine was mounted behind the gearbox which it drove via a short shaft. The gearbox supported the Rotor pylon which had two, contra-rotating, co-axial, two-bladed rotors. A fixed tricycle undercarriage mounted on steel tube trusses supported the helicopter on the ground. [1]
Flight testing revealed vibration at forward speeds above 20–30 km/h (12–19 mph; 11–16 kn) In an effort to reduce vibration the tailplane and fins were removed. [1]
In early 1948 the M-11FR engine was replaced by a 190 hp (140 kW) M-12, which proved troublesome so an M-11FR was refitted to complete the flight trials by 8 July 1948. [1]
Data from OKB Yakovlev, [1] Yakovlev aircraft since 1924 [2]
General characteristics
Performance
Related development
The Yakovlev Yak-11 is a trainer aircraft used by the Soviet Air Force and other Soviet-influenced air forces from 1947 until 1962.
The Yakovlev Yak-36, also known as Izdeliye V, is a Soviet technology demonstrator for a VTOL combat aircraft.
The Yakovlev UT-2 was a single-engine tandem two-seat low-wing monoplane that was the standard Soviet trainer during the Great Patriotic War. It was used by the Soviet Air Force from 1937 until replaced by the Yakovlev Yak-18 during the 1950s.
The Yakovlev Yak-24 is a Soviet twin-engine, tandem rotor, transport helicopter developed by Yakovlev in the 1950s. The Yak-24 saw limited use in the Soviet Air Force, and the exact number produced and duration of service are unknown due to inconsistencies in data.
The Yakovlev Yak-2 was a short-range Soviet light bomber/reconnaissance aircraft used during World War II. It was produced in small numbers, and most of them were destroyed during the opening stages of Operation Barbarossa.
The Yakovlev Yak-15 was a first-generation Soviet turbojet fighter developed by the Yakovlev design bureau (OKB) immediately after World War II. The main fuselage was that of Yakovlev Yak-3 piston-engine fighter modified to mount a reverse-engineered German Junkers Jumo 004 engine. The Yak-15 and the Swedish Saab 21R were the only two jets to be successfully converted from piston-power to enter production. 280 aircraft were built in 1947. Although nominally a fighter, it was mainly used to qualify piston-engine-experienced pilots to fly jets.
The Yakovlev Yak-19 was a prototype Soviet fighter built in the late 1940s. It was the first Soviet aircraft to be equipped with an afterburning turbojet, the Klimov RD-10F that was derived from the German Jumo 004 engine. Only two examples were built as it was rejected for service by the Soviet Air Force.
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 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 Bratukhin Omega was an early Soviet helicopter, the first product of a new Soviet design bureau, OKB-3 that was created from within TsAGI specifically to develop rotary-wing aircraft. Bratukhin's design was a side-by-side twin rotor machine, with each rotor carried on a long outrigger truss. The Omega's rotors were each powered by a separate engine carried in a nacelle also at the end of the truss. Captive trials commenced in August 1941 and revealed severe problems with engine vibration and overheating. Before these could be addressed, however, OKB-3 was evacuated ahead of the German advance into the Soviet Union.
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-100 was a single-engine transport helicopter developed in the USSR in 1948. This was the Yakovlev Design Bureau's second helicopter.
The Lavochkin La-200 was a two-seater, swept winged, night/all-weather jet prototype designed as an interceptor and manufactured by the Soviet Union's Lavochkin Design Bureau from 1948.
The Yakovlev Yak-58 is a small, multi-role utility transport and business aircraft. The aircraft features a pusher engine and twin boom tail. It saw limited production in the late 1990s.
The Yakovlev Yak-5 was an experimental trainer aircraft designed by Yakovlev OKB in the Soviet Union, and first flown in 1944.
The Yakovlev Yak-8 was a Soviet utility aircraft developed during World War II. It was not accepted for production, but received the NATO reporting name "Crib" anyway.
The Yakovlev Yak-200 was a prototype Soviet multi-engine trainer built during the 1950s. A modified version was built as the Yak-210 for navigator training, but only one example of each was built before the program was cancelled in 1956.
The Yakovlev Yak-140 was a Soviet prototype lightweight supersonic fighter developed during the 1950s. The prototype was completed in 1954, but it was denied authorization to enter flight testing and the program was cancelled in 1956.
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.
