On 7/17/2006 11:48 AM, Dave Butler wrote the following:
Al wrote:

There is indeed. In my experience, cycling the prop on a windmilling
engine has no effect. I'm talking about a constant speed prop on a
single engine aircraft, in this case a Mooney 201. Windmill RPM was
about 800, and no amount of pulling on the prop control would change
that RPM. Obviously, if the RPM doesn't change, the prop pitch didn't
change, and the glide is not affected.

Jim and I have 'round on this one before, but I stand by my observations.

Well, here's another data point on the same make and model, M20J. I
don't have the numbers to go with my observation, but subjectively when
I pull the prop control back at engine idle and ~best-glide, it feels
like I just disengaged the brakes.

Yes. That's the way it felt in the 182. I don't have any numbers but
the effect was not subtle. Hence my initial post.