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Old June 30th, 2006, 21:48   #1
C150J
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Default CS Props on a Single

Hi all -

If oil pressure is lost on a single with a constant speed prop, it GENERALLY goes to a high RPM setting instead of a full-feather (like twins), correct? If so, is the spring/nitrogen chamber BEHIND the hub and the oil reservoir in front of it?

Thanks!
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Old June 30th, 2006, 23:51   #2
subpilot
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Default Re: CS Props on a Single

If you lose oil pressure in a single the resistance from the relative wind will force the prop into the low pitch/high RPM setting. The nitrogen/springs is only for multi-engines that need to overcome the relative wind and move the prop to the feather position.
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Old June 30th, 2006, 23:52   #3
C150J
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Default Re: CS Props on a Single

Quote:
Originally Posted by subpilot
If you lose oil pressure in a single the resistance from the relative wind will force the prop into the low pitch/high RPM setting. The nitrogen/springs is only for multi-engines that need to overcome the relative wind and move the prop to the feather position.
EXCELLENT. Thank you!!!
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Old July 1st, 2006, 10:38   #4
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Default Re: CS Props on a Single

Just to clarify,

There still is a spring in a single engine C/S prop. It's is just like you said, backwards from the design of a multi.
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Old July 1st, 2006, 10:42   #5
C150J
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Default Re: CS Props on a Single

Quote:
Originally Posted by USMCmech
Just to clarify,

There still is a spring in a single engine C/S prop. It's is just like you said, backwards from the design of a multi.
Great to know - so is there a reservoir for the oil somwhere in the hub, pushing TOWARDS the engine (high pitch, low rpm setting). Thanks!

J.
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Old July 5th, 2006, 17:23   #6
TAMPACFIMEI
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Default Re: CS Props on a Single

I like this site for propeller information.

http://www.mccauley.textron.com/pro-...pframeset.html

Click on Tech Guide and then look under Propeller Operation for more links.
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