conceived by the US Marine Corps 1956. Hiller Aviation Museum (San Carlos California)
Powered by a Rotax engine and fuel it could also provide an autogyro mode that will have an extended range of 750 miles.
The hydrogen peroxide (90 per cent hydrogen peroxide and 10 per cent water) technology has been perfected in the space program where it was utilized as an altitude control system in the Gemini and Apollo projects.
Hydrogen peroxide is highly volatile in high enough concentrations for powering engines would require special handling, permissions for safety reasons, and specific storage requirements.
Another good feature of hydrogen peroxide rocket propulsion is that it is non-polluting, a first for helicopters (though electric options are currently being investigated) it produces only steam – water and oxygen.