Polikarpov TB-2

The Polikarpov TB-2 ( _ru. Поликарпов ТБ-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 TB-1 in service at the time, it was deemed insufficient for 1930 and the project was abandoned.cite book|author=Shavrov V.B.|year=1985|title=Istoriia konstruktskii samoletov v SSSR do 1938 g. (3izd.)|language=Russian|publisher=Mashinostroenie|id=ISBN 5-217-03112-3]

pecifications (TB-2)

aircraft specifications
plane or copter?=plane
jet or prop?=prop
ref=Shavrov 1985
crew=Five
length main=17.6 m
length alt=57 ft 9 in
span main=27 m
span alt=88 ft 7 in
height main=
height alt=
area main=128 m²
area alt=1377.8 ft²
empty weight main=4,220 kg
empty weight alt=9,304 lb
loaded weight main=6,770 kg
loaded weight alt=14,925 lb
engine (prop)=BMW VI
type of prop=V12 engines
number of props=2
power main=373 kW
power alt=500 hp
max speed main=216 km/h
max speed alt=117 knots, 134 mph
range main=1,200 km
range alt=648 nm, 746 mi
ceiling main=6,800 m
ceiling alt=22,310 ft
loading main=53 kg/m²
loading alt=11 lb/ft²
power/mass main=110 W/kg
power/mass alt=0.07 hp/lb
more performance=
*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)

References