The aircraft has higher landing gear, allowing the engine to be placed on the vertical center of gravity, which eliminates pitch changes with throttle application.
[1] The Double Eagle TT was designed to comply with amateur-built aircraft rules.
It features a single main rotor, a two-seats-in tandem open cockpit without a windshield, tricycle landing gear with wheel pants and a four-cylinder, liquid-cooled, four-stroke, single-ignition 150 hp (112 kW) Subaru EA82 automotive engine in pusher configuration.
[1] The aircraft fuselage is made from welded 4130 steel tubing, with some aluminum parts.
With full fuel of 12 U.S. gallons (45 L; 10.0 imp gal) the payload for the pilot, passengers and baggage is 503 lb (228 kg).