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M-50
Menasco M-50 aircraft engine at the San Diego Air & Space Museum
Type	Piston aero-engine
National origin	United States
Manufacturer	Menasco Motors Company
Major applications	Aeronca KM

The Menasco M-50 was an American four-cylinder horizontally-opposed aircraft engine.

Design and development

The engine was developed from 1937-1938 for use in Aeronca model KM light aircraft. Despite there being a deal for an estimated 500 Menasco M50 engines, only 10 engines were delivered as the deal broke down. Despite being initially being designed for aircraft usage, M-50 engines were also used to power midget race cars in Los Angeles. The failure of the engine in the market could be attributed towards the late entry for the engine into the market meant that the engine was soon overshadowed by more technologically advanced engines developed by its competitors such as the 65 hp (48 kW) flat-four engines from Continental and Franklin.

Applications

• Aeronca KM

Specifications

Data from FAA TCDS.

General characteristics

• Type: Four-cylinder horizontally-opposed piston engine
• Bore: 3.5 in (88.9 mm)
• Stroke: 3.75 inches (95.3 mm)
• Displacement: 144.4 cu in (2.37 L)
• Dry weight: 167 lb (76 kg)

Components

• Fuel system: Stromberg carburetor
• Fuel type: 73 octane gasoline
• Cooling system: Air-cooled
• Reduction gear: Direct drive
• Ignition system: Bendix-Scintilla magneto

Performance

• Power output: 50 hp (37 kW) at 2,500 rpm
• Compression ratio: 5.25:1

See also

Comparable engines

• Continental A40

Related lists

• List of aircraft engines

References

1. Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. pp. 93d. ISBN 0-7153-5734-4.
2. Rinek, Larry. "Menasco Aircraft Engines and Their Air Racing Heritage" (PDF).
3. "Federal Aviation Authority TC 191".

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• Menasco aircraft engines
• 1930s aircraft piston engines