Soviet Union The Soviet Union received at least 10 early-model ex-RAF Mustang Mk Is and tested them, but found them to "under-perform" compared to contemporary USSR fighters, relegating them to training units. Later Lend-Lease deliveries of the P-51B/C and D series, along with other Mustangs abandoned in Russia after the famous "shuttle missions", were repaired and used by the Soviet Air Force, but not in front-line service.Gordon 2008, pp. 448–449.
Soviet Union The Soviet Union received at least 10 early-model ex-RAF Mustang Mk Is and tested them but found them to "under-perform" compared to contemporary USSR fighters relegating them to training units Later Lend-Lease deliveries of the P-51B/C and D series along with other Mustangs abandoned in Russia after the famous "shuttle missions" were repaired and used by the Soviet Air Force but not in front-line serviceGordon 2008 pp 448–449