Aviation of World War II

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Training Flying Boat



SAM-11 Bekas - training flying boat - amphibious Alexander Sergeevich Moskalev, developed in OKB-31. Structurally, the SAM-11 was a two-seat monoplane with cantilever landing gear retractable into the wing. The engine with a pulling propeller was located on a pylon, well covered by streamlined hoods. The structure of the aircraft is made of wood. The aircraft was completed at the end of 1938 and flight tests began in mid-August.

The power plant. The People's Commissariat of the Aviation Industry decided to introduce into serial production not the domestic in-line air-cooled engine MM-1, but a licensed copy of the MV-6 of the French company Renault, with a capacity of 220 hp. With. The replacement of the engine was reflected in the addition of the prefix bis to the name of the aircraft. However, in 1940, the People's Commissariat of Aviation abandoned their production, at the same time closing all projects that were based on the use of this particular engine. Thus, SAM-11bis with MV-6 did not go into serial production and remained in the form of a prototype.

Crew 2
Legth, m 8.74
Wing span, m 11.49
Wing area, m² 20.20
Masses, kg
Empty 1,030
Maximum takeoff, kg 1,560 1,510
1 × PE MM-1 MV-6
Takeoff power, hp 1×230 2×220
Maximum speed over sea, km/h 217
Maximum speed at altitude, km/h 258 240
Service ceilingк m 5,600
Service range, km 900
Payload, kg 466 480

The plane was planned to be used as a training and communications aircraft. According to the test results, the flight performance turned out to be quite satisfactory, but the payload was small and there was no question about the use of the aircraft in the Civil Air Fleet, and no orders were received from the Air Force and Navy.

Photo Description
Drawing SAM-11bis

Drawing SAM-11bis


  • History of aircraft designs in the USSR, 1938-1950. /V.B. Shavrov/
  • Blue spiral /Moskalev A.S./
  • Seaplanes and ekranoplans of Russia 1910-1999 /G.F. Petrov/

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July 10, 2021.

The buffeting of the tail unit that appeared during the test was eliminated by installing special shields that deflect the air flow from the wing. In mass production, this problem was planned to be solved in other ways.