Klimov M-105 - Variants

Variants

• M-105 - (1,100 horsepower (820 kW)) First version produced at the end of 1939. Installed on some pre-war fighters.
• M-105P - (1,050 horsepower (780 kW)) First mass production engine (1940). Able to accept an autocannon in the "vee" between cylinder banks. Installed on the majority Soviet pre-war fighters - Yak-1, LaGG-1 and several experimental aircraft.
• M-105PA - (1,200 horsepower (890 kW)) Improved 1941 version.
• M-105PF (VK-105PF) - (1,260 horsepower (940 kW)) 1942 Modification with significantly increased power output at the expense of decreased high-altitude performance. In spite of Klimov's concerns about decreased service life, the engine was pressed into production at the insistence of Yakovlev, and further exploitation of "PF" version showed this was the right decision. The "PF" was installed on the most numerous versions of "Yak" fighters - Yak-1B, Yak-7B, Yak-9.
• VK-105PF2 & PF3 - (1,300 to 1,360 horsepower (970 to 1,015 kW)) Further increase in power output, which was believed to have exhausted the potential of the M-105 design for greater performance. The "PF2" was installed in the Yak-3.
• M-105PD - (1,170 horsepower (870 kW)) Engine with 2-stage E-100 turbocharger, experimental high-altitude version, unsuccessful.
• M-105R - (1,100 horsepower (820 kW)) Decreased propeller reduction gear ratio for bomber aircraft. Installed on Pe-2, BB-22 (Yak-4) and others.
• M-105RA - (1,110 horsepower (830 kW)) M-105PA with decreased propeller reduction gear ratio for bomber aircraft.