"Eric D" wrote in message
om...
If you start a descent from cruse by reducing pitch and maintaining
rotor speed, what happens to coning forces as compared to cruse?

I have noticed that during a decent in a R22 that you can get a
"Wop-Wop" noise from the main rotor blades. Changing cyclic or
increasing rotor speed a very small amount can make it go away, or at
least not heard from the cockpit. Can someone explain what is
occurring and why?

You're probably talking about when you descend 300-500'/min at around 80-85
kt. This is your blade chopping the vortex left by the previous one and can
be stopped by increasing your descent, speeding up or slowing down. It's not
down to coning forces.

Regards
Andrew


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