Yakovlev Yak-25 (I)
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Yakovlev Yak-25 (I)

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.

Yakovlev Yak-25 (I)A three-view drawing (1660 x 1157)

    Take-off weight3235 kg7132 lb
    Empty weight2285 kg5038 lb
    Wingspan8.88 m29 ft 2 in
    Length8.65 m28 ft 5 in
    Wing area14.00 m2150.69 sq ft
    Max. speed972 km/h604 mph
    Range1445 km898 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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