Supriya Ghosh

Grigorovich M 11

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Top speed  148 km/h
Length  7.6 m
Wingspan  8.75 m
Manufacturer  Shchetinin
Grigorovich M-11 httpsuploadwikimediaorgwikipediacommonsthu
Designer  Dmitry Pavlovich Grigorovich

The Grigorovich M-11 (or Shchetinin M-11) was a Russian single-seat fighter flying boat designed by Dmitry Pavlovich Grigorovich and built by Shchetinin


Design and development

Original conceived as a two-seater the prototype M-11 was built in 1916 at the Shchetinin factory in Petrograd. The M-11 was a biplane with a 100 hp (75 kW) Gnome Monosoupape rotary engine with a pusher propeller strut-mounted below the upper wing. The small number of two-seaters had a poor performance and were only used as trainers, Grigorovich developed a single-seat version powered a 110 hp (82 kW) Le Rhône engine and fitted with a forward firing machine gun in front of the cockpit. Originally 100 single-seat M-11s had been ordered but this was reduced to 60 as the aircraft had poor handling when landing or alighting on water. The M-11 were operated from snow and ice with twin skis fitted under the forward fuselage and a single ski under the tailplane.

To improve the water handling an improved variant was developed as the M-12 which had a re-designed hull and reduced loaded weight. Although the climb to height was improved the forward speed was 5 mph (8 km/h) less than the M-11 consequentially only a few M-12s were built.


M-11 (two-seat)
Small numbers built for training use.
M-11 (single-seat)
Production variant, 60 built.
Improved version.


  • Estonian Air Force
  •  Russia
  • Imperial Russian Navy
  •  Soviet Union
  • Soviet Naval Aviation
  • Specifications (M-11 single-seater)

    Data from

    General characteristics

  • Crew: 1
  • Length: 7.60 m (24 ft 11¼ in)
  • Wingspan: 8.75 m (28 ft 8½ in)
  • Wing area: 26 m2 (279.87 ft2)
  • Empty weight: 676 kg (1490 lb)
  • Gross weight: 926 kg (2041 lb)
  • Powerplant: 1 × Le Rhône rotary piston, 82 kW (110 hp)
  • Performance

  • Maximum speed: 148 km/h (92 mph)
  • Endurance: 2 hours  42 min
  • Armament

  • 1 x 7.62mm (0.3 in) Maxim machine-gun
  • References

    Grigorovich M-11 Wikipedia

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