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1. 08:35 AM - Re: Aerocomposites propellers (LesDrag@aol.com)
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| Subject: | Re: Aerocomposites propellers |
Hi Gary,
For a standard CS propeller, the blade should have about a 10 to 14 degree
pitch at about 9 inches from the tip.
There should be no oil pressure to the propeller with the engine stopped.
The standard propeller goes to low pitch without oil pressure.
The counterweighted blade propeller goes to high pitch without oil pressure.
A standard propeller shouldn't "stick" in high pitch unless something bad
happened inside the propeller hub.
Regards,
Jim Ayers
In a message dated 07/01/2007 6:52:18 P.M. Pacific Daylight Time,
glcasey@adelphia.net writes:
--> Rocket-List message posted by: "glcasey" <glcasey@adelphia.net>
I have a parallel-valve IO540 with a 3-blade Aerocomposites prop (sorry, not
on a Rocket, but I understand this is a common engine-prop combination).
During the last runup the rpm came down when cycling the prop, but didn't go
back up. After I parked it I noticed that the prop tips have a pitch of about
29 degrees, which seems to be more than previously. I'm thinking something
is wrong with the prop. Anyone know the degree of pitch at the tips when in
flat pitch position? I recall that it was practically zero, but I didn't
measure it. Any suggestions? I am using the Czech governor and it has
performed perfectly - so far, at least. Thanks for any information from this
Lancair
ES flyer.
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Gary Casey
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