What is the fuel efficiency of the Rotapower engine and how does it compare to the original OMC engine design?
Fuel efficiency is much improved over the OMC design. They were getting about .7 lb per HP-HR fuel consumption, where we have seen as low as .47. Our “normal” range at near maximum HP is .56 and around .5 at 4500 RPM and ~40 HP from our single-rotor 530cc engine. If the engine is producing 50 HP, the fuel consumption is .56 pounds per 50 HP per hour, or 28 pounds per hour. Gasoline weight approximately 6 pounds per gallon, so consumption is about 4.5 gallons per hour. If you think in metric units, there are 3.79 liters per US gallon. Therefore fuel consumption of the Rotapower engine producing 50 HP is estimated to be 17.25 liters per hour. We use 86 Octane “regular” gasoline for all applications.
