Mikulin AM-37

Mikulin AM-37
Type	liquid-cooled, V12 engine
National origin	Soviet Union
Manufacturer	Mikulin
First run	5 January 1941
Produced	1941
Number built	39+
Developed from	Mikulin AM-35
|} The Mikulin AM-37 was a Soviet aircraft piston engine designed prior to Russia's entry into World War II. An improved version of the Mikulin AM-35 V-12 engine, it was only produced in small numbers because of its unreliability. Development Design work on a development of the AM-35 with boosted supercharging and an intercooler positioned behind the supercharger began on the factory's initiative in December 1939. A batch of ten prototypes was completed in 1940 and bench-testing began on 5 January 1941. It passed its State acceptance trials the following April and was approved for production. It was tested in a variety of aircraft, but proved to be unreliable and prone to overheating. Factory No. 24 in Moscow built only twenty-nine AM-37s, as the new engine was designated, in 1941 before the German advance forced the factory to evacuate in October. Mikulin had been unable to resolve the issues with the AM-37 in the meantime and production was not resumed.[1] Variants AM-37A Planned version to be tested in February 1940, but no information if it was tested or it was even completed. 1,600 hp (1,200 kW) and a weight of 850 kg (1,870 lb). AM-37TK TK for toorbokompressor. Planned version with a turbocharger, no further information known. AM-37P P for Pushechnyy or cannon. A 1940 project for a model with an autocannon mounted in the space between the cylinders, firing through a hollow reduction-gear shaft. No further information available. Am-37u/v or AM-37UV UV for udlinyonniy val or lengthened shaft. An engine with a lengthened shaft and remote gearing for use in the Gudkov G-1 fighter that carried the engine behind the pilot. Ordered developed in 1940 and design work started in 1941, but it was not completed. Applications Mikoyan-Gurevich MiG-1 Mikoyan-Gurevich MiG-3 Mikoyan-Gurevich DIS Polikarpov TIS Tupolev Tu-2 Yermolaev Yer-2 Specifications Data from Kotelnikov, Russian Piston Aero Engines General characteristics Type: supercharged, liquid-cooled, V12 engine Bore: 160 mm (6.3 in) Stroke: 190 mm (7.5 in) Displacement: 45.84 L (2,797 in³) Dry weight: 885 kg (1,951 lb) Designer: Alexander Mikulin Components Supercharger: single-speed geared centrifugal supercharger Cooling system: liquid-cooled Performance Power output: 1,500 hp (1,119 kW) Compression ratio: 7.0:1 Power-to-weight ratio: 0.77 hp/lb (1.26 kW/kg) See also Related development Mikulin AM-35 Related lists List of aircraft engines References Notes Kotelnikov, p. 110 Bibliography Kotelnikov, Vladimir (2005). Russian Piston Aero Engines. Ramsbury, Marlborough: Crowood Press. ISBN 1-86126-702-9.