109 prop pitch (rpm) and the supercharger

[kohmelo]

How am i getting the feeling about those quotes that they "kick the clutch" to acquire better rpm powerband?

Like with those insane 80s turbocharged cars they used clutch slip to keep engine at better rpm (in the narrow maxpower area). Even without charger it would give technically short boost --> In car you kick the clutch for so long that you can rise RPM to best rpm usually the power from engine and momentun in driveshafts makes your car "burn rubber," or go "slowly sideways"

Technically would it be the same thing with prop pitch? "feather" prop to add rpm and then kick in the more coarser? pitch to force that engine power and momentum to movement for that narrow timeline.
I really don't think that pitch would change fast enough for that have any kind off use.

As for milling pitch up down in narrow area there might be some advantages if doing this at point where engine starts to lose RPM.

Well working or not i'll might test this for my own amusement.

[Crumpp]

"feather" prop to add rpm

You would not feather the prop to add rpm. Feathering is where you coarsen the blade pitch to the point the chord is parallel to the relative wind.

A feathered propeller produces no thrust at all and minimal drag. It would be very poor practice to run the engine with a feathered propeller and the engine is shut down when the propeller is feathered.

It is done to keep the shut down engine propeller from windmilling and causing loss of control.

http://www.youtube.com/watch?v=E7x8iAjFtzI

You are right about the Bf-109 pilots doing the aerial equivilent of "popping the clutch". That is exactly what they are doing so to speak. It is an advantage of a controllable pitch propeller. It is something that would take experience to do. The pilot must understand the principles of propeller operation regarding pitch and the relationship of manifold pressure and rpm.

[kohmelo]

Originally Posted by Crumpp

You would not feather the prop to add rpm. Feathering is where you coarsen the blade pitch to the point the chord is parallel to the relative wind.

Sorry about that, I really do did'nt know the exact terms in english. So term would be quite opposite what i meant.
Still you did understand what i meant. Great!

[Crumpp]

Still you did understand what i meant. Great!

I knew exactly what you meant! You expressed it well.