Klimov VK-106

The Klimov VK-106 was an experimental liquid-cooled V12 piston aircraft engine intended for Soviet aircraft during World War II.^[1]

VK-106
Type	V12 inline engine
Manufacturer	Klimov
First run	1943
Number built	over 300 engines
Developed from	Klimov M-105
Developed into	Klimov VK-107

Development

With the VK-105PF exhausting the potential of the M-105, Klimov prolonged its development into new VK-106 engine from 1941. Since air combat on the Eastern Front took place primarily at low altitudes under 4,000 m (13,000 ft) the new engine was built specifically for peak performance at those altitudes with a reduced compression ratio and a single-speed supercharger. Static testing was carried out from 27 October till 9 November 1942. Although reliable and easily installed in M-105-powered aircraft, VK-106 did not enter production because its cooling problems were not solved. Like M-105P, VK-106P could house an autocannon in the "vee" between the cylinder banks.

Applications

• Yak-1b with M-106

Specifications (VK-106-1sk)

Data from Kotelnikov^[2]

General characteristics

• Type: 12-cylinder supercharged liquid-cooled piston aircraft engine
• Bore: 148mm (5.83 in)
• Stroke: 170mm (6.69 in)
• Displacement: 35.08 liters (2,140 in³)
• Dry weight: 600 kg (1,320 lb)

Components

• Supercharger: Gear-driven single-stage single-speed centrifugal type supercharger
• Fuel type: 95-octane rating gasoline
• Cooling system: Liquid-cooled

Performance

• Power output:
  
• 1,007 kW (1,350 hp) at 2,600 rpm for takeoff
• 1,007 kW (1,350 hp) at 2,000 m (6,560 ft)
• Specific power: 28.8 kW/L (0.63 hp/in³)
• Compression ratio: 6.5:1
• Power-to-weight ratio: 1.68 kW/kg (1.02 hp/lb)

See also

Related development

• Hispano-Suiza 12Y
• Hispano-Suiza 12Z
• Klimov VK-100
• Klimov VK-103
• Klimov VK-104
• Klimov VK-105P
• Klimov VK-107

Comparable engines

• Allison V-1710
• Daimler-Benz DB 601
• Junkers Jumo 211
• Mikulin AM-35
• Rolls-Royce Merlin

Related lists

• List of aircraft engines