PPRuNe Forums - View Single Post - Helicopter crashes at Lumberton airport
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Old 16th Sep 2017, 07:18
  #41 (permalink)  
Join Date: Jun 2016
Location: Brantisvogan
Posts: 542
Just thinking out loud. A higher ROD would imply more energy is required to maintain RRPM with the engine out vs at idle. At the idle detent you're getting 50-60% Ng which is providing a fair amount of drive to overcome some of the inherent drag and friction in the rotor system/drive train. With no engine you would need to overcome 100% of the forces via autorotation, which would require a higher ROD.
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