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One way to power a helicopter rotor is to blow air through the rotor tip. Such helicopters are known as tip-jets and have the potential to be lighter and simpler than conventional helicopters. Tip-jets were widely studied in the 1950s but have not seen production due to low efficiency and very high noise levels. However, based on historical data, a compound configuration which uses tip-jet power only during vertical take-off and landing, and then transitions to an autogiro mode using a propeller for forward thrust has the potential to provide fast, efficient, and reliable flight characteristics, while minimizing noise levels to those encountered in conventional rotorcraft.

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Tip  jet  helicopter  compound  rotorcraft  autogiro  
 About This Document
 Subject Aeronautics and Astronautics
 Category Assignment
 Views 1003
 Downloads 349
 Added 21-12-12
 Contributor   daanish
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