|Role||Single-seat fighter flying boat|
|Designer||Dmitry Pavlovich Grigorovich|
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.
Specifications (M-11 single-seater)
Data from 
- 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)
- Maximum speed: 148 km/h (92 mph)
- Endurance: 2 hours 42 min
- 1 x 7.62mm (0.3 in) Maxim machine-gun
- Related lists
|Wikimedia Commons has media related to Grigorovich M-11.|
- Orbis 1985, page 2013
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985). Orbis Publishing.