The H3 was designed for the flight training, utility and personal-use roles. It was designed to comply with the European Class 6 microlight helicopter rules, in particular the French Class 6 Microlight Category, at a gross weight of 4500NaN0. It features a single main rotor and tail rotor, a two-seats-in side-by-side configuration enclosed cockpit with a bubble canopy, skid landing gear and a four-cylinder, liquid and air-cooled, four stroke 1000NaN0 Rotax 912ULS engine, a Dynali-developed fuel-injected 1100NaN0 conversion Rotax 912ULS-1 engine or a 1150NaN0 turbocharged Rotax 914 powerplant.[1] [2]
The aircraft's gross weight varies from 4500NaN0 for the microlight category, with heavier weights available depending on installed power in other national categories, such as light-sport aircraft. With the Rotax 912ULS engine, the gross weight is 5000NaN0, 5500NaN0 with the Rotax 912ULS-1 and 6000NaN0 with the Rotax 914.[1] [2]
The aircraft fuselage frame is made from welded stainless steel tubing. Its two-bladed rotor has a diameter of 7.141NaN1 and a chord of 18.51NaN1. With the Rotax 914 engine the aircraft has a typical empty weight of 2900NaN0 and a gross weight of 6000NaN0, giving a useful load of 3100NaN0. With full fuel of the payload for the pilot, passenger and baggage is 2670NaN0.[1] [2]