Polikarpov I-3

Infobox Aircraft
name=I-3/DI-2


caption=
type=Biplane fighter
national origin=USSR
manufacturer=Polikarpov
designer=
first flight=1928
introduced=1929
retired=
status=
primary user=Soviet Air Force
more users=
produced=
number built=Approximately 400
variants with their own articles=

Polikarpov I-3 ( _ru. Поликарпов И-3) was a 1920s Soviet fighter aircraft. It was a single-seat unequal-span biplane mainly of wood construction. I-3 was tested in 1928 and entered service with the Soviet Air Force in 1929 with about 400 built.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]

DI-2 ( _ru. ДИ-2) was a two-seat variant with a revised tailplane with 8° dihedral tested in 1929. A small production batch was planned despite inadequate performance due to shortage of two-seat fighters but the contract was canceled after the prototype crashed due to stabilizer failure in a dive.

pecifications (I-3)

aircraft specifications
plane or copter?=plane
jet or prop?=prop
ref=Shavrov 1985
crew=One
length main=8.08 m
length alt=26 ft 6 in
span main=11 m
span alt=36 ft 1 in
height main=
height alt=
area main=27.85 m²
area alt=299.8 ft²
airfoil=Clark Y
empty weight main=1,400 kg
empty weight alt=3,086 lb
loaded weight main=1,846 kg
loaded weight alt=4,070 lb
engine (prop)=BMW VI
type of prop=V12 engine
number of props=1
power main=545 kW
power alt=730 hp
max speed main=278 km/h
max speed alt=150 knots, 173 mph
range main=585 km
range alt=316 nm, 364 mi
ceiling main=7,200 m
ceiling alt=23,620 ft
loading main=66 kg/m²
loading alt=14 lb/ft²
power/mass main=295 W/kg
power/mass alt=0.18 hp/lb
more performance=
*Time to altitude: 12.6 min to 5,000 m (16,400 ft)
*Horizontal turn time: 14 sec
armament=
*2× 7.62 mm (0.3 in) PV-1 machine guns

pecifications (DI-2)

aircraft specifications
plane or copter?=plane
jet or prop?=prop
ref=Shavrov 1985
crew=Two
length main=8.2 m
length alt=26 ft 11 in
span main=11.8 m
span alt=38 ft 9 in
height main=
height alt=
area main=31.8 m²
area alt=342.3 ft²
airfoil=Clark Y
empty weight main=1,557 kg
empty weight alt=3,433 lb
loaded weight main=2,122 kg
loaded weight alt=4,678 lb
engine (prop)=BMW VI
type of prop=V12 engine
number of props=1
power main=545 kW
power alt=730 hp
max speed main=256 km/h
max speed alt=138 knots, 159 mph
range main=510 km
range alt=275 nm, 317 mi
ceiling main=6,300 m
ceiling alt=20,670 ft
loading main=67 kg/m²
loading alt=14 lb/ft²
power/mass main=257 W/kg
power/mass alt=0.16 hp/lb
more performance=
*Time to altitude: 17.5 min to 5,000 m (16,400 ft)
armament=
*2× fixed 7.62 mm (0.3 in) PV-1 machine guns
*2× turret-mounted PV-1 machine guns

References

*cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London |pages=
*cite book |last= |first= |authorlink= |coauthors= |title= The Illustrated Encyclopedia of Aircraft (Part Work 1982-1985)|year= |publisher= Orbis Publishing|location= |issn=