Rama, I apologize. I just tend to get excited when I know I'm right about something, especially if someone blatantly says I'm wrong about something that is my profession. I doubt you tell your professional pilot friends "You are wrong" when they correct you on something. No harm intended though. Vidar stated things more clear than I was able to.
I did talk to our company A&P. (airframe and powerplant mechanic) The one time the pitch changes without input of the prop levers is if you go into a dive. The change is, however, so brief that it is not something noticed and only a technical note. It would have to be something extreme so that the relative wind is driving the prop and not the engine. The RPM's will speed up a bit and only VERY briefly. That will change the prop pitch, but the governor will bring them back to what the pilot set them at. It's just a brief second or two of change, nothing that would be noticed normally by the pilot.
So in the end, the throttle (Manifold Pressure) will not change Prop Pitch.
Last edited by BSS_Sniper; 12-16-2007 at 02:57 PM.
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12-16-2007, 02:51 PM
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