Mikulin AM-34

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The Mikulin AM-34 (M-34) was Soviet Union’s first indigenous liquid-cooled aircraft engine. It also utilized the nation’s first variable-pitch propeller. The engine entered production in September 1934 and was utilized on Beriev MBR-2, Tupolev TB-3, Tupolev TB-4, Tupolev ANT-20, Petlyakov Pe-8, Kalinin K-7, Polikarpov I-17 and Bolkhovitinov DB-A.

[edit] Variants

AM-34

Naturally aspirated version

AM-34FRN

High-output version producing up to 1,200 hp at 1,850 rpm

AM-34N

Centrifugal type supercharger

[edit] Specifications (AM-34)

General characteristics

• Type: 12-cylinder 60° Vee aircraft engine
• Bore: 160mm (6.30 in)
• Stroke: 190mm (7.48 in)
• Displacement: 45.82 L (2,796 in³) early models. 46.66 L (2,847 in³) later models.
• Dry weight: 670 kg (1,477 lb)

Components

• Fuel system: Carburetor
• Cooling system: Liquid-cooled

Performance

• Power output:
  
  • 615 kW (825 hp) at 1,850 rpm for takeoff
  • 560 kW (750 hp) at 1,760 rpm for cruise
• Specific power: 13.42 kW/L (0.30 hp/in³)
• Compression ratio: 6.0:1
• Power-to-weight ratio: 0.92 kW/kg (0.56 hp/lb)