and 130 rpg for the side weapons. A total of 596 being built, none of them took part in combat. The three-cannon armament with full ammunition load was actually lighter than that of a standard Yak-3, and the one-second burst mass of was greater than that of most contemporary fighters. Yak-3PD high-altitude interceptor with Klimov VK-105PD engine and a single Nudelman-Suranov NS-23 cannon with 60 rounds of ammunition, reached in testing but did not enter production due to unreliability of the engine. Yak-3RD (Yak-3D) experimental aircraft with an auxiliary Glushko RD-1 liquid-fuel rocket engine with of thrust in the modified tail, armed with a single Nudelman-Suranov NS-23 cannon with 60 rounds of ammunition. On 11 May 1945, the aircraft reached at . During the 16 August test flight, the aircraft crashed for unknown reasons, killing the test pilot V.L. Rastorguev. Like all mixed powerplant aircraft of the time, the project was abandoned in favor of turbojet engines. Yak-3T tank destroyer version armed with 1 × Nudelman N-37 cannon with 25 rounds and 2 × Berezin B-20S cannons with 100 rpg. Cockpit was moved back to compensate for the heavier nose. Engine modifications required to accept the weapons resulted in serious overheating problems which were never fixed and the aircraft did not advance beyond the prototype stage. Yak-3T-57 single Yak-3T with a OKB-16-57 cannon Yak-3TK powered by a VK-107A engine, and fitted with an exhaust turbocharger. Yak-3U Yak-3 fitted with Shvetsov ASh-82FN radial engine with in an attempt to increase performance while avoiding the overheating problems of VK-107 and VK-108. Wingspan increased by , wings moved forward, cockpit raised by . Armament of 2 × Berezin B-20 cannons with 120 rpg. The prototype reached at and while successful did not enter production because it was completed after the war. Yak-3UTI two-seat conversion trainer based on Yak-3U powered by Shvetsov ASh-21 radial piston engine. The aircraft became the prototype for the Yak-11. Operators Normandie-Niemen squadron Air Force of the Polish Army Soviet Air Force SFR Yugoslav Air Force 111th Fighter Aviation Regiment (1944–48) 113th Fighter Aviation Regiment (1945–48) 112th Fighter Aviation Regiment (1945–48) 254th Fighter Aviation Regiment (1944–48) 83rd Fighter Aviation Regiment (1948–52) 116th Fighter Aviation Regiment (1948–52) 185th Mixed Aviation Regiment (1949–52) 198th Fighter Aviation Regiment (1949–52) 204th Fighter Aviation Regiment (1949–50) Modern production Yak fighters From 1991 to 2002 there were 21 Yakovlev Yak-3, Yak-7 and Yak-9 aircraft produced in