Grigorovich TB-5 (Russian: Григорович ТБ-5) was an experimental heavy bomber designed and tested in the Soviet Union in the early 1930s. Designed as a competitor for TB-3, TB-5 was intended to be powered by two FED 24-cylinder X engines of 746 kW (1,000 hp) each. When these were canceled, the underwing pods were revised to each house a pair of Bristol Jupiter engines in a push-pull configuration. Despite projected performance inferior to TB-3, it was hoped that TB-5 would gain an advantage by using less metal (in short supply at the time) thanks to its mixed construction of fabric-covered metal frame.
|National origin||Soviet Union|
|First flight||1 May 1931|
|Primary user||Soviet Union|
Test flights began on 1 May 1931 with disappointing results, in part due to poor thrust of the rear-facing engines. The prototype TB-5 was wrecked in a crash landing following the in-flight detachment of an engine in the spring of 1932, and with the entry into service of the superior TB-3 that year, the TB-5 project was abandoned.
- Crew: Six
- Length: 22.1 m (72 ft 6 in)
- Wingspan: 31 m (101 ft 8 in)
- Height: ()
- Wing area: 150 m2 (1614.6 ft2)
- Empty weight: 7,483 kg (16,497 lb)
- Loaded weight: 12,535 kg (27,635 lb)
- Powerplant: 4 × Bristol Jupiter V radial engine, 336 kW (450 hp) each
- Maximum speed: 180 km/h (97 knots, 112 mph)
- Service ceiling: 2,600 m (8,530 ft)
- Wing loading: 84 kg/m2 (17 lb/ft2)
- Power/mass: 107 W/kg (0.07 hp/lb)
- Guns: Two turrets, each with 2× 7.62 mm (0.3 in) PV-1 machine guns
- Bombs: Up to 2,500 kg (5,512 lb) of bombs
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- Shavrov V.B. (1985). Istoriia konstruktskii samoletov v SSSR do 1938 g. (3 izd.) (in Russian). Mashinostroenie. ISBN 5-217-03112-3.
- Gunston 1995, p. 91.
- Gunston 1995, p. 90.