Yakovlev AIR-7
| AIR-7 | |
|---|---|
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| Role | Sport aircraft |
| National origin | Soviet Union |
| Manufacturer | Yakovlev |
| Number built | 1 |
The Yakovlev AIR-7 was a prototype Soviet high performance light aircraft of the 1930s. It was a two-seat single-engined monoplane, which demonstrated excellent performance during testing. After the prototype almost crashed as a result of flutter, its designer, Alexander Sergeyevich Yakovlev suffered temporary disgrace and no production followed.
In April 1931, Alexander Sergeyevich Yakovlev, freshly graduated from the air force academy, was assigned as an engineering supervisor to State Aviation Factory No 39 (GAZ-39) where the designer Nikolai Nikolaevich Polikarpov worked as an NKVD prisoner. (While the factory included an "Internal Prison" which housed Polikarpov and many other designers, Yakovlev was a normal employee at the factory and not a prisoner). GAZ-39 specialised in production of Polikarpov's I-5 fighter, a biplane powered by a license-built Bristol Jupiter engine and Yakovlev realised that a monoplane light aircraft designed around the Jupiter engine of the I-5 and carefully streamlined could reach a higher speed than the I-5 while carrying a passenger.
Despite disapproval from the management of GAZ-39, Yakovlev received funding from Osoaviakhim, the Soviet paramilitary sports society, and assembled a small team within the factory to design and build the new aircraft, the AIR-7.
The resulting aircraft was a carefully streamlined two-seat tractor low-wing monoplane of mixed construction. Its fuselage was built of welded mild steel tubing, with dural panelling forward of the cockpit and fabric covering aft, and accommodated the pilot and passenger in tandem under an enclosed canopy. The wood and fabric wing was braced with cables and overwing steel struts to the fuselage, enabling a thinner wing to be used. The aircraft was fitted with a fixed conventional landing gear, with the mainwheels enclosed in trouser fairings to reduce drag, with a sprung metal tailskid. Powerplant was a single Shvetsov M-22, a license-built Bristol Jupiter radial engine enclosed by a Townend ring, driving a two-bladed propeller.
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