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Author Topic:   Prop Damage and Engine RPM's
tlynch posted 09-06-2002 12:03 PM ET (US)   Profile for tlynch   Send Email to tlynch  
Does damage to the leading edge of a propeller cause the max RPM's for an enigne at WOT to drop?

My engine has been through a whole lot lately, including a small 1/2" long ding along the leading edge of one blade (Stainless), maybe the leading edge is bent 1/8" from staight in the center of the ding. Could this result in a loss of about 250 RPMs?

Can you hammer the blade back flat with a hammer and something behind the blade?


Tom W Clark posted 09-06-2002 12:09 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     

Yes a damaged prop can cause a loss in RPM's. It can cause an increase too depending on the nature of the damage.

The ding you describe is very slight and I do not think it would affect your RPM's measurably.

Yes, you can straighten out that ding with a hammer and something to back it up, preferably a chunk of steel.

You should probably take your prop to a prop shop at the end of the season and have it truly straightened out and balanced. No big deal or expense in that task.

Bigshot posted 09-06-2002 04:18 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Basically you just cupped your prop. It could cause that many Rpm drop but doubtful. Straighten it out and see. Do Not drive it that way being one blade is grabbing way more than the other 2.

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