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I know how it works (sort of!), and I know the settings to use in the PA23
Apache, but how do you really use the constant speed/ variable pitch prop?
What does it do (apart from the obvious) that the fixed pitch one doesnt?

Say you want to decrease speed whilst remaining straight and level. I know
that in the PA23 I select 18"/2300 (down from 22"/2300) and maintain
altitude by pitching up. I know that because Ive been taught it by the
venerable George Orive, CFI. But why do I do that? Whats the theory behind
the reduction in power?

What Im really trying to ask is for a comprehensive guide of what the blue
lever and the black lever really do to your aircraft.

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