Question on CSP when engine quits
Joined: May 2010
Posts: 1,093
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From: UK
It depends on the RPM that you have set on the prop lever.
If the engine is not producing enough horses to turn the prop at that speed the prop will reduce pitch to keep up.
In practice you always set the prop to max RPM on approach.
If the engine is not producing enough horses to turn the prop at that speed the prop will reduce pitch to keep up.
In practice you always set the prop to max RPM on approach.
Thread Starter
Joined: Aug 2005
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From: Glens o' Angus by way of LA
Ok, so does the bottom of the green arc on the MAP gauge signify (normally about 15 inches) that below this the prop is going to fine pitch automarpticakky if it ain't there already ?
Joined: May 2010
Posts: 1,093
Likes: 9
From: UK
No, it is irrelevant. It just tells you the manifold pressure on a turbocharged engine and therefore the power being produced..
The prop knows nothing about MAP, it just understands RPM.
The prop knows nothing about MAP, it just understands RPM.
Last edited by The Ancient Geek; 16th December 2016 at 19:49.
Joined: Jun 2002
Aviation Qualifications: PPL
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From: Nanaimo (CAC8)
In practice you always set the prop to max RPM on approach
In the 182 towplane I fly, after takeoff, I bring the RPM back to 2300 rpm for noise abatement and leave it like that for the remainder of the flight, including the landing, again for noise considerations.
Now if I had to go around in an emergency, of course I would go to full fine, but I have determined (at altitude) that going around without changing the rpm and with those lovely barn-door (40 degree) flaps down, the rate of climb is more than adequate, even at DAs of 5000-6000'. I should confess at this point, that I am flying behind a P Ponk engine - 265 HP.
