CS Props on a Single

[C150J]

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!
J.

 

[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.

 

[C150J]

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!!!

 

[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.

 

[C150J]

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.

 

[TAMPACFIMEI]

I like this site for propeller information.

http://www.mccauley.textron.com/pro-sup/prosupframeset.html

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