The Yakovlev Yak-27 (NATO reporting name "Flashlight-C") is a family of Soviet supersonic aircraft developed in 1958 from the Yak-121 prototype.

The Yak-27 and Yak-27K interceptors, armed with guns and K-8 missiles respectively, reached or exceeded their requirements, but were overtaken in performance by the Sukhoi Su-9, and so production was not authorized.

A high-altitude interceptor version, the Yak-27V, was converted from the Yak-121 prototype by fitting a 1,300 kg•f (2,866 lb•f) Dushkin S-155 rocket booster in the rear fuselage, and Tumansky RD-9AKYe afterburning turbojets.

Although performance was very good, reaching the height of 23,000 m (75,400 ft) during trials, development was halted due to maintenance problems of the Dushkin S-155 rocket engine.

It had a longer wing with a span of 11.82 m (38 ft 9 in), with two Tumansky RD-9AF turbojet engines and a top speed of about 1,285 km/h (798 mph) at high altitude.