November 3, 2009
SEATTLE — Regi U.S., a Seattle-based company, is developing an internal combustion engine that it says is green, efficient and made of two parts. It will be called the RadMax engine.
The engine will be able to run on anything from ethanol to diesel to propane. It uses no pistons, valves or spark plugs. Instead, it has a disk-shaped rotor and driveshaft that turns within a cylindrical housing, which remains stationary. It is compact, resulting in an engine that weighs one sixth as much as a piston engine but with the same horsepower. Regi U.S. said in a press release that the engine could be used for anything from weed trimmers to jet engines to personal power generation.
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