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Nelson H-44
American aircraft engine From Wikipedia, the free encyclopedia
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The Nelson H-44 is an American single ignition, four-cylinder, horizontally opposed, direct drive, two-stroke aircraft engine that was developed by the Nelson Engine Company for use in motorgliders.[1]
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Design and development
The H-44 was designed in the period following the Second World War and a specially designed motor glider was created by Hawley Bowlus to utilize the engine, the Bowlus/Nelson Dragonfly.[1]
The engine was not certified. Under the CAR 5 regulations then in place in the US for gliders, a certified auxiliary power glider could be flown with a non-certified engine and propeller. The engine is instead described on the Dragonfly type certificate.[1]
The four-cylinder engine runs on a 12:1 mixture of 80 octane gasoline and SAE 30 oil. It is equipped with a single Carter WA1 carburetor and a recoil starter.[1]
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Operational history
Employed in the Dragonfly the H-44 proved underpowered, which led to the design of the H-49 version. The engine family was not a success and few were produced.[2][3]
Variants
Applications
Specifications (H-44)
Data from FAA Type Certificate Data Sheet[1]
General characteristics
- Type: Four-cylinder, two-stroke, single-ignition aircraft engine
- Bore: 2.25 in (57 mm)
- Stroke: 2.75 in (70 mm)
- Displacement: 44 cubic inches
- Dry weight: 40 lb (18 kg)
- Designer: Ted Nelson
Components
- Fuel system: Carter WA1 carburetor
- Fuel type: 80 octane gasoline
- Oil system: premixed oil in fuel, SAE 30 oil mixed at 12:1 fuel to oil
- Cooling system: air
- Reduction gear: none
Performance
- Power output: 25 hp (19 kW) at 3900 rpm
- Compression ratio: 9:1
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See also
References
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