Engine startup randomness

[MachFly]

A spinning prop still creates more drag than one stopped....even when not feathered.

This is also modeled in game.

Check your glide in a typhoon with and without prop stopped.

You do realize we discussed this more than ones already with you participating in those threads, right?

[icepac]

You need to produce this topic or forget referencing it.

I am correct about the prop. and drag.

If you want, you can discuss your theory at the air racing forums with the guys who build and race the unlimiteds.

http://www.aafo.com/hangartalk/forumdisplay.php?f=2

[MachFly]

You need to produce this topic or forget referencing it.

I am correct about the prop. and drag.

If you want, you can discuss your theory at the air racing forums with the guys who build and race the unlimiteds.

http://www.aafo.com/hangartalk/forumdisplay.php?f=2

I never said that your wrong, I agree with what you said.

It just seems like we discussed this already.

[colmbo]

Yeah but that's only if you feather the prop after turning the engine off.

No, a stopped prop is less drag than a windmilling prop.  Doesn't matter if it's feathered or not.

[MachFly]

No, a stopped prop is less drag than a windmilling prop.  Doesn't matter if it's feathered or not.

Just re-read your post, missed the "prop stopped part".
So as we discussed before you would need to slow down to nearly your stall speed or slower to stop the prop. If you turn the engine off to slow down faster than your probably going 400+, at that speed your prop will not stop. So given that prop is not stopped (which it will not be) the prop will provide more drag with the engine off than idling.

[MachFly]

Icepac,

Sorry for being an @$s didn't realize why your were saying that. Just noticed that Colmbo was talking about a stopped prop.

[icepac]

Hamilton standard props go to the finest pitch available when no oil pressure is present.

The reason for this is..... if the prop governor system experiences a loss of oil pressure......but your engine still has oil pressure, you still have a setting that generates thrust instead of beating the air with feathered blades.

Aeroproducts props have thier own oil system separate from the engine and possibly an accumulator that will allow feathering after an engine failure but you had better be quick with it.

Curtis electric props are electric and will hold the position they were last set if you lose power.

[MachFly]

Curtis electric props are electric and will hold the position they were last set if you lose power.

Hope the planes that use those have a reliable electrical system...