BARCELONA — French inventor Guy Negre is hoping to build an environmentally friendly small multi-purpose vehicle powered by compressed air. He has been working on perfecting the propulsion idea since the late 1990s. In that time, he has developed a rotary valve intake system and a Formula One 12-cyl. race car using the compressed-air technology. His system already works to his satisfaction on about 20 prototypes that he built in Nice, France. Five have been submitted for official ...

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