Technical data
Type MR-2
Function Naval Recce
Year 1926
Crew 2
Engines 1*450hp Lorraine-Dietrich
Length 13.6m
Wingspan 15.6m
Wing area 56.7m2
Empty weight 1770kg
Loaded weight 2770kg
Wing Load (kg/m2) 49.0
Power load (kg/hp) 6.2
Speed at 0m 179km/h
Landing Speed 82km/h
Landing Roll 15sec
Takeoff Roll 25sec
Range 900km
Flight Endurance 5h
Ceiling 4200m
1000m 7min
2000m 17min
3000m 34min
Guns 1...2 ?
Bombs ?

MR-2 by D.P.Grigorovich

Biplane flying boat, development of the MRL-1, with more powerful engine and increased upper wing span. The hull shape was also improved, less expensive materials were used in construction.

Flight tests started on September 23, 1926. Series of successful flights (naval pilot A.S.Melnitskij) made positive impression on designers and factory trial commetee.

State Acceptance Trials were performed by F.S.Rastegaev, pilot from NII VVS. Since he had no experience with naval aircraft, he performed several training flights on MU-1 and MUR-1 (one flight on each plane).

The very first flight (October 19) ended with catastrophe. On low altitude MR-2 suddenly did lose stability. Longitudinal oscillations with increasing amplitude resulted in steep dive, and aircraft crashed into the water up-side-down.

Investigations of the accident revealed too rear (48%) location of the CG and positive angle of tailplane installation. TsAGI wind tunnel tests proved this configuration catastrophically unstable...


  • "History of aircraft construction in the USSR", Vol.1 p.397;
  • None?

    Created July 28, 1998 by
    Alexandre Savine
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