The Harmon Der Donnerschlag (English: Thunderclap) is an American homebuilt aircraft that was designed and produced by Harmon Engineering of Howe, Texas.
[1] Der Donnerschlag features a wire-braced shoulder-wing, a single-seat open cockpit, fixed landing gear and a single engine in tractor configuration.
With full fuel of 10 U.S. gallons (38 L; 8.3 imp gal) the payload is 190 lb (86 kg).
[1] By October 2013 there were no examples registered in the United States with the Federal Aviation Administration and none may exist anymore.
[3] Data from Plane and Pilot[1]General characteristics Performance