Rotapower® Engine Performance

High Performance in a Small Package

Rotapower® Engine Performance

  High Power to Weight Ratio
  • More than 1.5 HP per pound of installed weight in high-performance versions
  • Compares with .6 HP/lb. to 1 HP/lb. for 2-strokes and .3 HP/lb. to .65 HP/lb. for 4-stroke pistons
  • Instantaneous torque characteristic identical to 6-cylinder 4-stroke piston (two rotor model)
  High Power to Volume Ratio
  • (Power Output / Volume) > 100 HP per cubic foot of installed volume
  • Compares with 36 HP/ft³ to 50 HP/ft³ for 2-strokes and 10 HP/ft³ to 20 HP/ft³ for 4-stroke piston engines
  Few Moving Parts
  • Only 2 moving parts in a single rotor engine
  • Compares to 7 parts for 2-stroke and 25 parts for 4-stroke piston with same instantaneous output torque
  • Charge- or air-cooled rotor design eliminates many engine components typical of rotary engines
  • Can be overhauled in less than 30 minutes
  • Less moving parts means longer life and lower cost
  Solid Fuel Economy
  • Specific Fuel Consumption < .45 lb./HP-hr ~ (stratified charge). Expect <.4 lb./HP-hr when both stratified charged and direct injected
  • Compares to .65 lb./HP-hr for 2-strokes and ~ .4 lb/HP-hr for the best 4-stroke piston
  Proven Multi-Fuel Performer
  • Demonstrated on gasoline, natural gas, alcohol and propane
  • Spark-ignited diesel, kerosene and jet fuel
  Very Low Emissions Levels
  • See Emissions Performance
  • Carbon Monoxide(CO) and unburned hydrocarbon (HC) emissions two orders of magnitude better than 2-stroke, and one order of magnitude better than many industrial or commercial 4-stroke piston engines
  • Nitrogen dioxide emissions much lower than 4-stroke piston, comparable to 2-stroke
  • Stratified charge together with direct fuel injection reduces fuel consumption and emissions to below 4-stroke piston level
  Enhanced Energy at Exhaust
  • Acts like a naturally occuring thermal reactor
  • Ideal for turbocharge/co-generation applications
  • Tolerates high exhaust back pressure for good muffling (like 4-stroke piston)
  Low Vibration Levels
  • Hard mounted engine can be used as part of the structure
  • Perfect radial balance; allows rigid mounting
  Modular Design
  • Stacking of rotors easily extends range of available power