MOLLER INTERNATIONAL ACHIEVES BREAKTHROUGH IN ROTARY ENGINE PERFORMANCE
Davis, CA, May 14, 2008 – Moller International (OTC-BB: MLER) announced today that it has
achieved a major breakthrough in rotary engine performance. A version of the Company’s
Rotapower® engine is designed in such a way that the engine’s two rotors operate in series rather
than parallel. This design allows the first compressor/expansion rotor to supercharge the second
power rotor while the exhaust from the power rotor is further expanded in the
compressor/expansion rotor, extracting additional power. In effect, the engine operates in what is
termed a compound cycle. Because of the additional energy captured from the exhaust gases,
engine noise is reduced by 93% and exhaust temperature is reduced by 47%. Moller
International’s non-compounded Rotapower® rotary engine has already demonstrated a fuel
consumption 12% below that of the new Mazda Renesis rotary engine. Compounding is expected
reduce the Rotapower® engine’s fuel consumption by an additional 25%.
Rotary engines are particularly small and light relative to their power output and nearly vibrationfree
in operation. Compounding makes the Rotapower® engine potentially much better than the
piston engine in fuel consumption as well. This was the major limitation that prevented the rotary
engine from supplanting all piston engines. It now becomes an attractive candidate for the Plugin
Hybrid Electric Vehicle (PHEV) market where weight, space, fuel consumption, emissions and
vibration are all critical. The Rotapower® engine previously demonstrated its ability to meet
California’s Super Ultra Low Emissions Vehicle (SULEV) standard without exhaust aftertreatment.
Moller International is in the final phase of negotiations to license worldwide production and
marketing rights for its Rotapower® engines to Rotapower Engine Systems, Limited of
Southampton, United Kingdom.