Sukhoi Su-11 (II)
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Sukhoi Su-11 (II)

The availability of a more powerful radar, the Uragan (Hurricane) 5B, matched with new medium-range AAMs available in alternative semi-active radar guidance and infra-red homing versions in the mid 'sixties, led to upgrading of the basic T-43 (Su-9). The larger-diameter dish of the Uragan I-band radar necessitated an intake centrebody of almost twice the cross-section area of that of the series Su-9. This, in turn, required increasing the intake lip diameter to allow for the same airflow, which, the AL-7F engine being retained, remained essentially unchanged. External piping ducts along the upper rear fuselage, similar to those of the Su-7BM, signified a revised fuel system, and armament comprised two medium-range missiles (one radar-guided and the other IR-homing). With the AL-7F-1 turbojet providing an afterburning thrust of 10,110kg, the revised T-43 series limited all-weather interceptor was adopted by the IA-PVO Strany under the (re-used) designation Su-11 as interim equipment pending introduction of the more advanced Su-15 that was being developed in parallel. The Su-11 supplemented and partly replaced the Su-9 until similarly withdrawn in the early 'eighties.

Sukhoi Su-11 (II)A three-view drawing (1667 x 1033)

    Take-off weight14000 kg30865 lb
    Empty weight9100 kg20062 lb
    Wingspan8.43 m28 ft 8 in
    Length17.4 m57 ft 1 in
    Wing area26.2 m2282.01 sq ft
    Max. speed1915 km/h1190 mph
    Ceiling17000 m55750 ft

Red Phoenix, 11.05.2012

No kidding there, Paul. The only surefire way to tell the difference is the shape of the intake and the dorsal spine of the 'Fishbed'.

paul scott, 18.08.2009

Strange as its above/below profile section was identical to the MiG-21.

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