Yakovlev Yak-4 on:
[Wikipedia]
[Google]
[Amazon]
The Yakovlev Yak-4 (Service names Yak-4, BB-22bis (''Blizhnij Bombardirovschik'', "short-range bomber")) was a
The Yak-4 was an improved version of the Yak-2 with more powerful
Yak-4 description on aviation.ru
{{WWIIUSSRAF Yak-004 1940s Soviet bomber aircraft World War II Soviet bombers Aircraft first flown in 1940 Twin piston-engined tractor aircraft
Soviet
The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
light bomber
A light bomber is a relatively small and fast type of military bomber aircraft that was primarily employed before the 1950s. Such aircraft would typically not carry more than one ton of ordnance.
The earliest light bombers were intended to dro ...
used during World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
. It was developed from the Ya-22/ Yak-2.
Design and development
The Yak-4 was an improved version of the Yak-2 with more powerful Klimov M-105
The Klimov M-105 was a V12 liquid-cooled piston aircraft engine used by Soviet aircraft during World War II.Gunston 1989, p. 90
Development
The M-105, designed in 1940, drew heavily on Klimov's experience with the Hispano-Suiza 12Y ( license-bu ...
engines and a number of other changes that were made to try to rectify the problems of the Yak-2. Two additional fuel tanks were added in the outer wings to bring the total capacity up to and the gunner's canopy was bulged to give him more room to use his ShKAS machine gun
The ShKAS (Shpitalny-Komaritski Aviatsionny Skorostrelny, Shpitalny-Komaritski rapid fire for aircraft; Russian: ШКАС - Шпитального-Комарицкого Авиационный Скорострельный) is a 7.62 mm calibre ...
. The upper fuselage was redesigned to improve the gunner's field of fire and the oil coolers were relocated from the sides of the engine nacelles to the 'chin' position to improve their performance.
Operators
; * VVSSpecifications (Yak-4)
References
Further reading
*External links
Yak-4 description on aviation.ru
{{WWIIUSSRAF Yak-004 1940s Soviet bomber aircraft World War II Soviet bombers Aircraft first flown in 1940 Twin piston-engined tractor aircraft