Grigorovich M-11

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

M-11
Role	Single-seat fighter flying boat
National origin	Russia
Manufacturer	Shchetinin
Designer	Dmitry Pavlovich Grigorovich
First flight	1916
Number built	60+

Design and development

Originally 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 by 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 was 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.

Variants

M-11 (two-seat)

Small numbers built for training use.

M-11 (single-seat)

Production variant, 60 built.

M-12

Improved version.

Operators

 Estonia

• Estonian Air Force

 Russia

• Imperial Russian Navy

 Soviet Union

• Soviet Naval Aviation

Specifications (M-11 single-seater)

Data from ^[1]

General characteristics

• Crew: 1
• Length: 7.60 m (24 ft 11.25 in)
• Wingspan: 8.75 m (28 ft 8.5 in)
• Wing area: 26 m² (279.87 sq ft)
• Empty weight: 676 kg (1,490 lb)
• Gross weight: 926 kg (2,041 lb)
• Powerplant: 1 × Le Rhône rotary piston , 82 kW (110 hp)

Performance

• Maximum speed: 148 km/h (92 mph, 80 kn)
• Endurance: 2 hours 42 minutes

Armament

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

See also

Related lists

• List of flying boats and floatplanes