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Old 23rd Sep 2012, 22:57
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Lumps
 
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Feather and 12" MP for zero thrust?

Can anyone explain this to me? At first glance it looks like for zero thrust they are recommending to run the engine at 12" MP and prop in feather!

What really happens?



Arrrgh, ok can't get image to work so:

SIMULATED ONE ENGINE INOPERATIVE for Baron B55, procedure is:

1. Propeller Lever - RETARD TO FEATHER DETENT
2. Throttle Lever - SET 12 in. Hg MANIFOLD PRESSURE

The procedure should be accomplished by alternating small reductions of propeller and then throttle until the desired setting has been reached.

What is the 'desired setting' in this situation? Without a fair amount of experience in flying with an engine actually feathered, how is one supposed to know when you're at zero thrust without just taking the POH's word for it. Does the prop actually feather? Hope not for the engine's sake.

Last edited by Lumps; 23rd Sep 2012 at 23:07. Reason: trying to add an image
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