Polikarpov TB-2

TB-2

Role: Bomber
National origin: Soviet Union
Manufacturer: Polikarpov
First flight: 1930
Number built: One

The Polikarpov TB-2 was a Soviet heavy bomber prototype designed and tested in the 1920s. It was a wooden-construction sesquiplane with engines mounted on the bottom wing. Work on the sole prototype began in 1927 and it was tested in 1930. Although TB-2 performance was superior to that of the Tupolev TB-1 in service at the time, it was deemed insufficient for 1930 and the project was abandoned.

Specifications (TB-2)

Data from Shavrov 1985

General characteristics

Crew: 5
Length: 17.6 m (57 ft 9 in)
Wingspan: 27 m (88 ft 7 in)
Height: ()
Wing area: 128 m² (1377.8 ft²)
Empty weight: 4,220 kg (9,304 lb)
Loaded weight: 6,770 kg (14,925 lb)
Powerplant: 2x— BMW VI V12 engines, 373 kW (500 hp) each

Performance

Maximum speed: 216 km/h (117 knots, 134 mph)
Range: 1,200 km (648 nm, 746 mi)
Service ceiling: 6,800 m (22,310 ft)
Wing loading: 53 kg/m² (11 lb/ft²)
Power/mass: 110 W/kg (0.07 hp/lb)
Time to altitude: 12 min to 3,000 m (9,840 ft)
Horizontal turn time: 26 sec
Takeoff roll: 210 m (688 ft)
Landing roll: 180 m (590 ft)

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Source: WikiPedia