KlimovVK-107 is a V-12 liquid-cooled piston aircraft engine used by Sovietaircraft during World War II.
VK-107 was a brand-new design having little in common with its predecessors M-105 and VK-106. To achieve a greater power output, each cylinder now had four valves (two intake and two exhaust),
crankshaftand camshafts were completely revised, and a new superchargerdesign was implemented. Although the engine could have been ready for production as early as 1942, Sovietfactories lacked the capacity to produce a brand new design. Thus, less powerful VK-105PF and VK-105PF2 were built instead. However, the appearance of LuftwaffeMesserschmitt Bf 109G with Daimler-Benz DB 605engine in 1943 created an urgent demand for a more powerful engine. VK-107A was put into production in 1944 and was used on Yak-9U fighters. The engine was not well liked by either pilots or mechanics -- it had a life expectancy of only 25 hours and war emergency powerwas almost never used for fear of decreasing this even more. The engine was also difficult to service, in part because exhaust gas collectors were on the inside of the cylinder banks.
* VK-107A - production version
* VK-107R - version for hybrid piston-
motorjetpowered Mikoyan-Gurevich I-250 (N)and Sukhoi Su-5fighters
* VK-108 - attempt to further develop VK-107 with 1,380 kW (1,850 hp) on takeoff, used on several
Yakovlev Yak-3prototypes but did not enter production.
type=12-cylinder supercharged liquid-cooled Vee aircraft piston engine
displacement=35.08 liters (2,140 in³)
weight=765 kg (1,685 lb)
valvetrain=Two intake and two exhaust valves per cylinder actuated via an
supercharger=Single stage, two-speed, gear-driven
centrifugal type supercharger
*1,230 kW (1,650 hp) at 3,200 rpm for takeoff
*1,082 kW (1,450 hp) at 3,800 m (12,500 ft)
specpower=35.1 kW/L (0.77 hp/in³)
power/weight=1.61 kW/kg (0.98 hp/lb)
Daimler-Benz DB 605- Rolls-Royce Merlin- Rolls-Royce Griffon- Allison V-1710
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