The H-3 was a two seat general purpose helicopter. It had a duraluminium tube superstructure, an open cockpit and an undergear of metal skids. The design is typical of ultra-light helicopters of the period, being powered by tip-jets — two ramjets, one at the tip of each rotor blade. The small tail rotor, powered by the motion of the main rotor, was necessary only for yaw control since the tip-jets eliminated the need for an anti-torque force. The ramjets could burn multiple types of fuel, giving the helicopter a certain versatility.