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The Grigorovich MR-3 (Morskoi Razviedchik - 3) was a prototype maritime patrol flying boat built in the Soviet Union during the late 1920s that was not accepted for production.

Grigorovich MR-3
Role	Maritime patrol aircraft Type of aircraft
National origin	Soviet Union
Manufacturer	Grigorovich
First flight	1929
Status	Cancelled
Number built	1

Specifications MR-3

Data from The Osprey Encyclopedia of Russian Aircraft, 1875–1995[1]

General characteristics

• Crew: 3
• Length: 11.4 m (37 ft 5 in)
• Wingspan: 15.6 m (51 ft 2 in)
• Wing area: 52 m² (560 sq ft)
• Empty weight: 2,027 kg (4,469 lb)
• Gross weight: 3,082 kg (6,795 lb)
• Fuel capacity: 440 kg (970 lb)
• Powerplant: 1 × BMW VI water-cooled V-12, 510 kW (680 hp)

Performance

• Maximum speed: 194 km/h (121 mph, 105 kn)
• Range: 750 km (470 mi, 400 nmi)
• Service ceiling: 4,000 m (13,000 ft)
• Time to altitude: 7 minutes to 1,000 m (3,300 ft)

Armament

• Guns: 1 × 7.62 mm (0.3 in) PV-1 machine gun

References

2. http://www.all-aero.com/index.php/34-planes/20666-grigorovich-rom-1-grigorovich-mr-3

Bibliography

• Gunston, Bill (1995a). The Osprey Encyclopedia of Russian Aircraft 1875–1995. London: Osprey. ISBN 1-85532-405-9.
• Kotelnikov, V.; Kulikov, V. & Cony, C. (December 2001). "Les avions français en URSS, 1921–1941" [French Aircraft in the USSR, 1921–1941]. Avions: Toute l'Aéronautique et son histoire (in French) (105): 50–56. ISSN 1243-8650.

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