Harmon Engineering Company

{{Short description|American aircraft manufacturer}}

{{Use mdy dates|date=January 2022}}

{{Use American English|date=January 2022}}

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| name = Harmon Engineering Company

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| type = Privately held company

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| fate = Out of business after 1978

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| industry = Aerospace

| products = Aircraft plans

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The Harmon Engineering Company was an American aircraft manufacturer based in Howe, Texas. The company specialized in aircraft plans for amateur construction.Plane and Pilot: 1978 Aircraft Directory, pages 142-143. Werner & Werner Corp, Santa Monica CA, 1977. {{ISBN|0-918312-00-0}}

The company's original design, given the German name, Harmon Der Donnerschlag ({{langx|en|Thunderclap}}) is a simple, open cockpit, single-seat mid-wing aircraft, built with a welded 4130 steel tube fuselage and wooden-framed wings, all covered in doped aircraft fabric covering. The aircraft was later developed into the Harmon Mister America, which uses the same construction methods and has a similar lay-out. Both designs also employ inexpensive automotive Volkswagen air-cooled engines.