Abstract: A marine propulsion system is disclosed that includes at least one nozzle having a combustion chamber therein. The nozzle has an exit end that is shaped so as to flare outwardly. A fuel reformer separates gasoline or other liquid hydrocarbon fuel into hydrogen gas and carbon monoxide and a fuel line feeds the hydrogen gas into the combustion chamber of the nozzle. Combustion air is also fed into the combustion chamber. In addition, measured quantities of raw sea water are also delivered into the combustion chamber. An electrical igniter within the combustion chamber ignites the hydrogen gas causing the water to flash into steam. The steam exhausts through the exit end of the nozzle resulting in a forward thrust.

Abstract: A concentric, valveless internal combustion engine is provided, consisting essentially of a rotary piston which revolves in a casing about a central shaft. The rotary piston contains combustion cavities distributed equidistantly around its perimetral wall surface. The casing contains combustion chambers and adjoining exhaust ports, and fuel intake manifolds in spaced relationship from one another. One or more means for igniting the fuel mixture is/are distributed at spaced intervals which are designed to provide timed ignitions of the fuel mixtures. Means are provided for starting the engine's rotation, and for feeding it a fuel-air mixture. As the piston rotates it carries the fuel mixture from the intakes to the points of fuel ignition, then to combustion chambers where the ignited fuel gases expand rapidly, and next to ports where the gases are exhausted from the engine.