for unarmed (no live fire) interception practice. Yak-25RV-II Remote-piloted drone for armed (live fire) interception practice. Yak-25PA (perekhvahtchik aerostahtov - balloon interceptor) Balloon interceptor version of the Yak-25RV, probably armed with a single cannon; one built / converted. Yak-25 family prototypes and projects Yak-2AM-11 Reconnaissance and tactical reconnaissance projects powered by 2 x Mikulin AM-11(Tumansky R-11), cancelled as production of Tumansky R-11 allocated to MiG-21. Yak-13 immediate predecessor of Yak-120, not built (re-use of designation from light tourer of 1946). Yak-25K Yak-25M with removed cannon, equipped Yak-25K-5 weapon system consisting of the "Izumrud" radar and four RS-1U (NATO AA-1 "Alkali") beam-riding missiles on the wings inboard of the engine pods. Small number built. Yak-25K-7L Yak-25K testbed for K-7L missiles. This version did not enter service and the aircraft version was abandoned. Yak-25K-75 Yak-25M testbed for K-75 missiles. This weapon did not enter service and the aircraft version was abandoned. Yak-25K-8 (Yak-25S K-8) Two Yak-25K converted to Yak-25K-8 weapons system testbeds with two K-8 (NATO AA-3 'Anab') missiles. Two Yak-25M aircraft (Yak-25S K-8) were modified for carriage trials of the K-8 missile. Terminated in favor of the upcoming Yak-28P. Yak-25L (letayuschchaya laboritoriya - flying laboratory) Ejection seat testbed. Yak-25MR (morskoy razvedchik - maritime reconnaissance aircraft) Maritime reconnaissance aircraft prototype. Yak-25MSh Prototype of Radio controlled target drone, no production but many were converted to drones after service, but did not have MSh designation. Yak-25R Reconnaissance version with glazed nose for second crewman (navigator) and two cameras. Aircraft armed with 23mm cannon, 10 pre-production aircraft built. Yak-26 Tactical nuclear bomber development, 9 aircraft built. Yak-120M Yak-120 re-engined with Mikulin AM-9A (AM-5 with 0stage added to compressor, can-annular combustion chamber and afterburning and improvements to armament and avionics. Yak-120MF Yak-120M converted to RD-9F engine testbed. Yak-122 Tactical reconnaissance aircraft prototype evolved from the Yak-25 and the Yak2AM-11 project, powered by two RD-9F turbojets. This aircraft was converted into the Yak-27R tactical reconnaissance prototype. Yak-123 prototype for Yak-26 tactical nuclear bomber. Yak-125B OKB designation for Yak-25B tactical nuclear strike aircraft prototype, carrying 1 x (spetspodveska - special slung load) Yak-SM-6 Two production Yak-25s modified for testing K-6 AAMs, missile cancelled used for other test tasks. Operators Soviet Air Force Soviet Anti-Air Defense Specifications (Yak-25) See also References Citations Bibliography External links Yak-25 at Ugolok Neba - description in Russian, photos and drawings Yakovlev Yak-26 1950s Soviet fighter aircraft Yakovlev Yak-25RV Yak-025 Twinjets Mid-wing aircraft Aircraft