John Britton wrote:

The V-belts on helicopters such as the Hughes 269 series,the Robinson R-22, and the Rotorway Scorpion & Exec. DON'T EXIST TO PROVIDE FOR AUTOROTATION,BUT RATHER TO PROVIDE A MEANS OF DISENGAGING THE ENGINE FROM THE ROTOR SYSTEM TO FACILITATE STARTING THE ENGINE. A SPRAG CLUTCH PROVIDES FOR AUTOROTATION, AND AS SOON AS THE ENGINE QUITS IT DISENGAGES Best Regards John

 
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