[1] The EH1-01 RotorMouse was designed to comply with the US Experimental - Amateur-built aircraft rules.
The acceptable power range is 145 to 250 hp (108 to 186 kW) and the standard engine used is a 145 hp (108 kW) Garrett AiResearch 36-55 auxiliary power unit (APU).
Its 20 ft (6.1 m) diameter two-bladed rotor employs a NACA 0012 airfoil.
The cabin width is 24 in (61 cm) and the aircraft mounts stub wings similar to the Bell AH-1 HueyCobra.
[1] By March 2015 one example had been registered in the United States with the Federal Aviation Administration.