Yakolev AIR-2 / Ya-2S
A development of the AIR-1, with a radial engine, the Air-2 was built in two versions with size and construction almost identical to the predecessor.
The first one was powered by M-23 engine. It had a plexiglas canopy covering both cockpits and opening sidewards. But the aircraft was too slow to show advantage of a canopy. In addition. engine vibration was above acceptable level.
A second version with a 60hp Walter engine had performance slightly worse (due to engine drag) than the AIR-1. Four were built and used for training.
A version of the AIR-2 with a more powerful Siemens engine was designated Ya-2S. Performance was improved substantially and it became possible to install the AIR-2S on floats designed by V.B.Shavrov. The floatplane version was flown on May 18, 1931. Transition from wheels to floats took as little as 1hour 10minutes. Pilot B.L.Bukhgolts and passenger V.B.Shavrov performed a short straight flight, and without stopping the engine another 10 minutes of circle flight. Next crew to fly were Ju.I.Piontkovskij and A.S.Yakolev.
The aircraft was flown many times on Moscow river (Moscow) without any problems.
Engine: 1 x Siemens Sh13A, 62kW
Max take-off weight: 710 kg / 1565 lb
Empty weight: 470 kg / 1036 lb
Wingspan: 8.9 m / 29 ft 2 in
Length: 7.7 m / 25 ft 3 in
Wing area: 18.7 sq.m / 201.28 sq ft
Max. speed: 140 km/h / 87 mph
Cruise speed: 120 km/h / 75 mph
Ceiling: 3350 m / 11000 ft
Range: 500 km / 311 miles