Help with Prop Governor Theory
08-23-2010, 02:38 PM
#1
Line Holder
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Joined APC: Apr 2008
Position: C172 Right
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Help with Prop Governor Theory
I'm getting ready for my COMM SEL ride, and feel pretty much ready for most of the oral except for 1 thing-Prop governors. First off, I'm taking the ride in a 172, but we still need to know landing gear, prop governor, and pressurization systems (and feel free to let me know if I missed anything else). What I get so far about governors is this: props change pitch by means of oil pressure through the governor. In a single-engine, increased pressure=higher pitch/low RPM and vice-versa for decreased pressure. But I don't know where to go from there as far as explaining it for the oral. Any help would be much appreciated. Thanks in advance.
08-23-2010, 02:59 PM
#2
APC co-founder
Joined APC: Feb 2005
Position: B777
Posts: 5,853
There are tons of resources via google, do a quick search.
Here's one I found: AIRCRAFT PROPELLER CONTROL AND OPERATION
Know normal ops and failure modes along with immediate actions for your check ride (and when you're flying the plane too of course).
I've been out of GA for a while, but don't you have to take a Comm. check in a complex aircraft?
Here's one I found: AIRCRAFT PROPELLER CONTROL AND OPERATION
Know normal ops and failure modes along with immediate actions for your check ride (and when you're flying the plane too of course).
I've been out of GA for a while, but don't you have to take a Comm. check in a complex aircraft?
08-23-2010, 03:05 PM
#3
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HSLD's explanations are nice, and I would get out the Jeppesson explanation, read it a few times, explain it to the wall without looking at the book to make sure you have it. The main thing is to know what it is going to do if you lose oil pressure (low pitch), know the basics of how it works (such as the flyweights, springs, oil path, etc.) and what the aerodynamic advantages are to having one (pitch matched to airspeed mainly) and some disadvantages as well such as higher drag idling in the flare, higher nose weight, higher mx cost, oil leakage, and slightly reduced glide ratio come to mind. I think it would be good to know why we cycle the prop during a run-up also.
08-23-2010, 03:06 PM
#4
pants on the ground
Joined APC: Jan 2007
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http://www.faa.gov/library/manuals/a...83-3a-5of7.pdf
ch 11-3
come back if this doesn't answer your questions?
ch 11-3
come back if this doesn't answer your questions?
08-23-2010, 06:31 PM
#5
Gets Weekends Off
Joined APC: Jun 2008
Position: USAF
Posts: 1,398
Originally Posted by A320fan
I'm getting ready for my COMM SEL ride, and feel pretty much ready for most of the oral except for 1 thing-Prop governors. First off, I'm taking the ride in a 172, but we still need to know landing gear, prop governor, and pressurization systems (and feel free to let me know if I missed anything else). What I get so far about governors is this: props change pitch by means of oil pressure through the governor. In a single-engine, increased pressure=higher pitch/low RPM and vice-versa for decreased pressure. But I don't know where to go from there as far as explaining it for the oral. Any help would be much appreciated. Thanks in advance.
Pressurization... if it's like any other commercial ride, it's doubtful they'll ask you much about that. But it's always good to know to basics... like if you loose pressure really fast at altitude - it can be a precarious situation.
08-24-2010, 02:33 AM
#6
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rusty
Originally Posted by HSLD
I've been out of GA for a while, but don't you have to take a Comm. check in a complex aircraft?
08-24-2010, 06:31 AM
#7
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Joined APC: Jan 2006
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Originally Posted by N9373M
I think you can split the ride to save bucks. i.e. do most of the air work in a 172, then some pattern work in a complex to demonstrate the moving parts. I could be way off base, those brain cells are long gone.
08-24-2010, 06:58 AM
#8
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Posts: 26
I split up (used two aircraft) during my initial CFI checkride and I wouldn't do it again. It was a pain in the butt for me and the examiner, made a long checkride even longer and when it was all said and done I bet I didn't save much money.
08-24-2010, 07:15 AM
#9
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The (only) time when splitting up the aircraft used for the CFI ride is advantageous may be when the checkride is ended early due to weather, exam failure, or some other problem and it has to be continued.
08-24-2010, 10:26 AM
#10
Gets Weekends Off
Joined APC: Jul 2008
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Originally Posted by Cubdriver
The (only) time when splitting up the aircraft used for the CFI ride is advantageous may be when the checkride is ended early due to weather, exam failure, or some other problem and it has to be continued.
Joe
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