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 The Su-11 supplemented and partly replaced the Su-9 until similarly withdrawn in the early 'eighties.

3-View

A three-view drawing (1667 x 1033)