Harmon Der Donnerschlag

The translation of this open-cockpit sport plane’s name is “The Thunderclap” It was the airframe of this plane which was used as the foundation for “Mr. America.” Both share similar wings, fuselage, tail unit and landing gear. The wings are a wire-braced, shoulder type with two simple beam spars. As with the Mr. America, seating is for one, behind a modified Volkswagen engine turning a two-blade wooden prop.

Gross Wt. 600 lb
Empty Wt. 350 lb
Fuel capacity 10 USG
Wingspan 19’6”
Length 14’6”
Engine 73-hp Volkswagen
Top speed 120 mph
Cruise speed 110 mph.
Stall speed 55 mph
Climb rate 800 fpm
Ceiling 10,000 ft
Takeoff run 130 ft
Landing roll 250 ft
Range 500 mile