John Barrett asks:
>  ...but my question is how could the RPM remain at 3300
> when the throttle is brought back to idle, if indeed the MAP
> dropped to an idle or near idle condition.

If the airspeed was high enough, a flat prop would windmill at 3300 rpm.
The horsepower necessary to spin the engine at 3300 rpm was being supplied
by the airflow through the prop disc. That would definitely put the brakes on.
As the airspeed drops, the prop need not spin so fast, so eventually
it slows down.

If you want to reduce the airspeed and rpm quickly, pull up into a steep climb.
Nose over before it gets too slow of course.

Good luck on avoiding any related engine damage. Will you be sending it back to
Continental for teardown and inspection?  I don't know if 3300rpm is
enough to stretch the connecting rods, but it is under warranty, right?


-bob

[Marv: please delete my prior message from the wrong address]