The Tumansky R-11 (initially AM-11) is a Soviet Cold War-era turbojet engine.

Stechkin as a twin-spool axial-flow high-altitude non-afterburning turbojet for Yakovlev Yak-25RV reconnaissance aircraft.

This engine was the first Soviet twin-spool turbojet.

It was first run in early 1956[1] and was later employed in some variants of the Yakovlev Yak-26 and Yakovlev Yak-27, as well as the Yak-28.

A total of 20,900 R-11 engines were built.