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Developed in parallel with the Yak-23, the similarly-powered Yak-25 was conceptually more advanced and derived from the Yak-19. By comparison with the earlier fighter, the Yak-25 employed the higher-speed TsAGI S-9S-9 laminar section at the wing root translating to a KV-4-9 section at the tip with a constant thickness of 9% throughout. Despite the greater diameter of the 1625kg Rolls-Royce Derwent - similar to that installed in the Yak-23 prototypes - than the RD-10F of the Yak-19, the diameter of the fuselage of the Yak-25 was unchanged. Sweptback horizontal tail surfaces were adopted, provision was made for two 200-litre drop tanks under the wing tips and armament comprised three 23mm NR-23 cannon. The first of two prototypes was flown on 31 October 1947, but, although the subsequent flight test programme was allegedly successful, no production contract was issued for the Yak-25. One of the prototypes was utilised during 1948 for (fixed) tandem-wheel undercarriage trials as part of the Yak-50 development programme.
 | A three-view drawing (1660 x 1157) |
WEIGHTS |
Take-off weight | 3235 kg | 7132 lb |
Empty weight | 2285 kg | 5038 lb |
DIMENSIONS |
Wingspan | 8.88 m | 29 ft 2 in |
Length | 8.65 m | 28 ft 5 in |
Wing area | 14.00 m2 | 150.69 sq ft |
PERFORMANCE |
Max. speed | 972 km/h | 604 mph |
Range | 1445 km | 898 miles |
neiyi, 20.06.2011 tandem-wheel undercarriage trials as part of the Yak-50 development programme. | , 20.06.2011 Yakovlev Yak-25 | hans 2603, 14.06.2011 hier kann bombardier aber garnicht meckern ,falls er überhaupt ahnung von flugzeugen hat , oder wenigstens etwas geschmack .... |
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