 {| |} the sukhoi su-11 (nato reporting name 'fishpot-c') was an interceptor aircraft used by the soviet union in the 1960s. ==design and development== the su-11 was an upgraded version of the sukhoi su-9 ('fishpot') interceptor, which had been developed in parallel with the okb's swept wing su-7 fighter bomber. recognizing the su-9's fundamental limitations, sukhoi began work on the su-11, which first flew in 1961 as the t-47 prototype. the su-11 shared the su-9's delta wing, swept tailplanes and cigar-shaped fuselage, as well as the circular nose intake, but had a longer nose to accommodate the more powerful 'oryol' (eagle; nato reporting name 'skip spin') radar set. a more powerful lyulka al-7f-1 turbojet was installed, providing 9.8&nbsp;kn (2,210&nbsp;lbf) more afterburning thrust for improved climb rate and high-altitude performance (and to compensate for increased weight). the su-11 can be distinguished from the su-9 by the external fuel pipes atop the fuselage, aft of the cockpit. the su-9's beam-riding k-5 missiles were replaced by a pair of r-98 (aa-3 'anab') weapons, usually one r-98mr semi-active radar homing and one r-98mt infrared guided. like many interceptors of the period, it had no cannon. production of the definitive su-11-8m began in 1962, ended in 1965, after about 108 aircraft had been delivered, although it is believed that at least some su-9s were upgraded to su-11 form. a conversion trainer version, the su-11u 'maiden,' was also developed. similar to the su-9u, it had full armament and radar systems for training purposes. because the second seat further reduced its already marginal fuel capacity, it was not really intended for combat use. ==operational history== development problems and accidents delayed squadron introduction with the soviet air force (vvs)/ soviet air defence forces (pvo) until 1964 and only small number of aircraft were delivered. even with the superior radar, the su-11 remained heavily dependent on ground control interception (gci) to vector its pilot onto targets. it had no capability against low-flying aircraft either, and sukhoi okb considered the su-11 to be a misfire, much inferior to the far more formidable su-15 ('flagon'). nevertheless a few examples remained operatio
Single-engined_jet_aircraft Soviet_fighter_aircraft_1960a1969 Sukhoi_aircraft