Der Donnerschlag | |
---|---|
Role | Homebuilt aircraft |
National origin | United States |
Manufacturer | Harmon Engineering Company |
Status | Production completed |
Variants | Harmon Mister America |
The Harmon Der Donnerschlag (English: Thunderclap) is an American homebuilt aircraft that was designed and produced by Harmon Engineering of Howe, Texas. The aircraft was intended for amateur construction. [1]
Der Donnerschlag features a wire-braced shoulder-wing, a single-seat open cockpit, fixed landing gear and a single engine in tractor configuration. [1]
The aircraft's 19.5 ft (5.9 m) span wing has two beam-type spars and employs a 16% airfoil at the wing root, tapering to a 12% airfoil at the wingtip. The standard engine used is the 75 hp (56 kW) Volkswagen air-cooled engine automotive conversion, driving a two-bladed wooden propeller. [1] [2]
The aircraft has an empty weight of 350 lb (160 kg) and a gross weight of 600 lb (270 kg), giving a useful load of 250 lb (110 kg). With full fuel of 10 U.S. gallons (38 L; 8.3 imp gal) the payload is 190 lb (86 kg). [1]
The aircraft was later developed into the Harmon Mister America. [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