Yakovlev Yak-25 (1947)

Infobox Aircraft
name=Yak-25


caption=
type=Interceptor aircraft
manufacturer=Yakovlev OKB
designer=
first flight=1947-11-02
introduced=n/a
retired=
status=Project cancelled in 1948
primary user=Soviet Air Force
more users=
produced=
number built=1
program cost=
unit cost=
developed from=
variants with their own articles=Yakovlev Yak-30

Yakovlev Yak-25 was a Soviet military aircraft, an early turbojet-powered interceptor aircraft designed by the Yakovlev OKB. The designation was later reused for a different interceptor design.

Development

Yak-25 was an early post-World War II design. Typical of the aircraft of its time, it had a straight wing and bulbous fuselage with round cross-section to accommodate the large centrifugal-flow turbojet engine. The aircraft first flew on November 2, 1947. Despite the successful test flight program and good performance, especially manoeuvrability, the project was cancelled in 1948 because the more advanced and quicker swept-wing Mikoyan-Gurevich MiG-15 and Lavochkin La-15 (also powered by the RD-500 engine) were entering production.

Variants

Although the straight-winged Yak-25 was cancelled, Yakovlev OKB attempted to further developed the design by fitting it with a 35° swept wing. The resulting aircraft, called Yak-30, first flew on September 4, 1948. During testing, it reached a speed of Mach 0.935 in a dive. The aircraft's top speed was increased by 40 km/h (25 mph) and service ceiling was increased by 1,000 m (3,280 ft) compared to its predecessor. However, the swept wing was found to be unsatisfactory with poor aileron authority. Like Yak-25, the aircraft did not enter production because Mikoyan-Gurevich MiG-15 was superior. The Yak-25 designation was later reused for a twin jet heavy fighter (1952) and the Yak-30 designation was later reused for a jet trainer.

Operators

;USSR
*Soviet Air Force

pecifications (Yak-25)

aircraft specifications

plane or copter?=plane
jet or prop?=jet

crew=1
length main=8.66 m
length alt=28 ft 5 in
span main=8.88 m
span alt=29 ft 1 in
height main= m
height alt= ft
area main=14.0 m²
area alt=151 ft²
empty weight main=2,285 kg
empty weight alt=5,027 lb
loaded weight main=
loaded weight alt=
max takeoff weight main=3,535 kg
max takeoff weight alt=7,777 lb

engine (jet)=Klimov RD-500
type of jet=centrifugal compressor turbojet
number of jets=1
thrust main=15.6 kN
thrust alt=3,500 lbf

max speed main=982 km/h
max speed alt=530 knots, 610 mph
cruise speed main=
cruise speed alt=
range main=1,100 km
range alt=590 nm, 690 mi
ceiling main=14,000 m
ceiling alt=46,000 ft
climb rate main=37 m/s
climb rate alt=7,260 ft/min
loading main=163 kg/m²
loading alt=34 lb/ft²
thrust/weight=0.45

guns=3× 23 mm (0.906 in) Nudelman-Rikhter NR-23 cannon, 75 rounds/gun

ee also

aircontent

related=

similar aircraft=
* Dassault Ouragan
* Lavochkin La-15
* Mikoyan-Gurevich MiG-9

sequence=

lists=
* List of military aircraft of the Soviet Union and the CIS

see also=