Revolution Rotary Engines Inc.

Competitive Advantages of the Rotary Engine

Engines are often categorized by the total displacement of the engine. Industrial engines typically produce about 3 hp for every 100 cc of displacement. High performance automotive engines produce approximately 7 hp for every 100 cc, as do many two-stroke engines. The rotary-type engine is unique in as much as it produces one power stroke per revolution of the output shaft from one rotor, similar to a single piston two-stroke or a twin 4-stroke, but operates on the much more efficient four-stroke combustion cycle. The rotary combustion engine therefore, is considered to have twice the displacement of a four-stroke piston engine of the same nominal displacement. The rotary engine requires only one housing or cylinder, where the 4-cycle reciprocating engines require two cylinders for the same nominal displacement. Vibrations are also a major component of reciprocating engine failure.

The design of the Wankel engine gives it an excellent power to weight ratio. This is especially important for the aircraft industry since climbing speed, distance for take-off and landing, as well as fuel and cargo are all affected by the compact design and weight of the engine.

Pollution is now becoming so significant an issue that two-stroke engines are likely to disappear or become very expensive while small four-stroke piston engines must reduce their exhaust emissions in order to be compliant with government regulations. The new Revolution Rotary engines are very clean burning, and meet the new standards for emission controls.

One of the greatest advantages to the rotary engine is its highly durable quality. At any rpm, the rotor is only moving at 1/3 the speed of the output shaft. There are no valves, camshafts, lifters, lifter springs, pistons, heads or head gaskets which are prone to frequent failure in most piston engines, the rotor and the eccentric shaft are the only two moving components.

The compact construction of the Rotary engines will allow RRE into the market where more power is required and small space is available. Better fuel economy, lower pollution levels, newer engines being developed make the rotary combustion engine a highly viable alternative to the piston engines.

Superior power to weight ratio.
Compact size requires less room.
Rotary design leads to very low vibration.
True 4 cycle operation.
Clean burning – Harmful emissions less than 5% of comparable 2 cycle.
Merely 2 moving parts per rotor – 40 + for piston driven 4 stroke.
Simplicity of design creates a more durable engine.