The Grigorovich MR-5 was a long-range reconnaissance flying boat designed by the Grigorovich Design Bureau for the Soviet Navy in the late 1920s.

Design

The MR-5 was similar to the MR-2 in layout, armament, and payload, but had a more powerful BMV VI engine and an all-metal hull. Flight tests were conducted in Taganrog beginning in July 1929, and although the aircraft behaved well in the air, takeoff was sluggish.[1]

Specifications

Data from [2]

General characteristics

• Crew: 2
• Length: 11.4 m (37 ft 5 in)
• Wingspan: 15.6 m (51 ft 2 in)
• Wing area: 53.0 m² (570 sq ft)
• Empty weight: 2,027 kg (4,469 lb)
• Max takeoff weight: 3,082 kg (6,795 lb)
• Powerplant: 2 × BMV VI V-cylinder inline engine, 372 kW (499 hp) each

Performance

• Maximum speed: 194 km/h (121 mph, 105 kn)
• Endurance: 4 hours
• Service ceiling: 4,000 m (13,000 ft)
• Time to altitude: 1,000 m (3,281 ft) in 7.0 minutes[3]
• Wing loading: 58.2 kg/m² (11.9 lb/sq ft)

Armament

• Guns: 1-2 x machine guns

References

Sources