AERONAUTICS AND PROPULSION Working in secret, the Eurocopter X3 Hybrid Helicopter team designed, built and flew the high-speed compound helicopter demonstrator in under two years, using company funds. The hybrid has exceeded its design goal, reaching 232 kt.—50% faster than a conventional helicopter. Few entities burn through more fuel each year than the U.S. Navy, and the service has charted a course to develop the use of alternative fuels unmatched around the globe. Navy ...

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