Nelson H-49

Nelson H-44
Type	Two-stroke aircraft engine
National origin	United States
Manufacturer	Nelson Engine Company
Designed by	Ted Nelson
Major applications	Bowlus/Nelson Dragonfly
Produced	circa 1947

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.

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.

The engine was not certified. Under the CAR 5 regulations then in place in the USA 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.

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.

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.

Data from FAA Type Certificate Data Sheet

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