REGI US and Reg Technologies announced earlier in October that a preliminary series of tests have been successfully completed on the prototype 125hp RadMax rotary engine. The company also has a 42hp prototype engine.
Engineers at the company had made important modifications and tests over the last 90 days pertaining to the sealing of the RadMax engine and the shape of the cam. The new seals include an oil seal which will prevent the oil from going into the combustion chamber therefore eliminating excess hydrocarbons resulting in a cleaner burning engine, according to a company spokesperson. Details of the sealing will remain proprietary.
The main objectives of these tests were to eliminate oil leaks from entering the combustion chamber, and to reduce compression losses. The next phase of development will be implemented to complete an operating engine with a list of activities to support the required research, design, testing, and evaluation.
The company is negotiating with a major company to perform the comprehensive testing program required to produce a commercial engine for potential end users.
|The Radmax rotary principle. Click to launch animation. Source: Reg Technologies|
REGI US owns the US rights to the Rand Cam/RadMax rotary technology that is used in an engine with only 13 moving parts: the disk-shaped rotor and the axial vanes (up to 12) mounted perpendicular to the direction of rotation. The vanes slide back and forth against cam surfaces on each end of the rotor to alternatively expand and contract the chamber volume. (Earlier post.)
Through the process of these sliding vanes, combustion chambers form between the rotor, stator walls and vanes where the fuel/air mixture is injected, compressed, combusted and exhausted. Increasing the number of vanes increases the number of combustion events throughout a revolution. The original Rand Cam had two; the current version has 12.
The engine operates at lower speeds than a typical Wankel engine (less than 2,000 rpm) and at higher compression ratios: 15 and 20 to 1.
The design makes it possible to produce a total of 24 continuous power impulses per one rotation that is vibration-free and extremely quiet. The engine can operate using multiple fuels including gasoline, natural gas, hydrogen, propane and diesel. Reg Technologies is in the process of testing a Rand Cam/RadMax diesel engine for a generator application for hybrid electric cars and for unmanned aerial applications for the U.S. military.