Technical data
Type MRL-1
Function Naval Recce
Year 1925
Crew 2
Engines 1*400hp Liberty
Length 10.6m
Wingspan 13.2m
Wing area 50.0m2
Empty weight 1660kg
Loaded weight 2600kg
Wing Load (kg/m2) 52.0
Power load (kg/hp) 6.5
Speed at 0m 185km/h
Landing Speed 95km/h
Landing Roll 15sec
Takeoff Roll 40sec
Turn time 65sec
Range 950km
Flight Endurance 5h
Ceiling 3050m
1000m 11min
2000m 26min
3000m 55min
Guns 1...2 ?
Bombs ?

MRL-1 by D.P.Grigorovich

Project of new flying boat 'took off' in 1924 at Moscow apartment of D.P.Grigorovich. P.D.Samsonov and K.A.Vigand participated in the project. Assembly was performed at 'Krasnyj Letchik' (The Red Pilot) factory, and in Summer 1925 MRL-1 was ready.

Single-strut pusher biplane had very elegant and clean appearance, but the hull construction was very expensive (overuse of expensive redwood) and seriously overweight. Gunner position was located right behind the propeller.

Despite speed requirements were fulfilled, ceiling and climb were unacceptably poor. Unsuccessful hull shape resulted in 'wave pushing' and delayed takeoff. MRL-1 story followed D.P.Grigorovich 'tradition' to came up with good design after several failures (like with M-5 and M-9).

MRL-1 was not accepted for production, the only built aircraft served for a long time with the White Sea Navy.

? MR-2

  • "History of aircraft construction in the USSR", Vol.1 p.396-397;
  • None?

    Created July 28, 1998 by
    Alexandre Savine
    Back to
    Main Gate