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  #1  
Old 07-06-2022, 08:50 AM
dan carley dan carley is offline
 
Join Date: Jan 2005
Posts: 780
Default Propeller

I have a catto prop that only turns 2625 rpmís
On a 0360
I believe that the prop is over pitched can this make your engine run hot?
Thanks
Danny carley
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  #2  
Old 07-06-2022, 08:14 PM
rmarshall234 rmarshall234 is offline
 
Join Date: Jun 2008
Location: San Diego, CA
Posts: 382
Default

I'm not an engine or prop expert but it seems to me that a higher pitch would create greater loads on the engine which would then in turn generate more heat. Rejecting the heat, now that's something entirely different.
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  #3  
Old 07-07-2022, 01:27 AM
swift12 swift12 is offline
 
Join Date: May 2021
Location: Palmerston North
Posts: 131
Default

I might be talking out of a hole in my butt but from my mechanical background...yes absolutely...engine turns slower but under more load as said above just like running a vehicle up a hill in top gear. I was looking at a catto...is it a cruise pitch prop?
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  #4  
Old 07-07-2022, 06:37 AM
dan carley dan carley is offline
 
Join Date: Jan 2005
Posts: 780
Default Prop

Yes itís a cruise prop
Talked to catto they can repitch it
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  #5  
Old 07-07-2022, 07:46 AM
rmarshall234 rmarshall234 is offline
 
Join Date: Jun 2008
Location: San Diego, CA
Posts: 382
Thumbs up

Cool. Let's us know if it improves cooling at all
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Robert Marshall
www.robertsairservices.com
RV-3 N333LT - 500hrs PIC
AFF Skydiving Instructor (Ret)
IF1 Reno Racer (Ret)
IF1 Crew Chief
A&P / IA
Parachute Rigger
Acroduster SA750 - Almost finished!
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  #6  
Old 07-07-2022, 08:24 AM
BH1166 BH1166 is offline
 
Join Date: Nov 2017
Location: Eatonton Georgia
Posts: 738
Default

Why I own ground adjustable prop. My opinion is 75 more rpm wonít make much if any difference in anything but what the tach reads.
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RV6A Purchased N72TX
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  #7  
Old 07-07-2022, 10:16 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 7,316
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On over pitched prop will increase load and reduce RPM. In an internal combustion engine, higher RPMs create more heat and increased load creates more heat. Not a combustion engineer, so can't tell you the ratios for each, but expect they are in the same ballpark (If I had to guess I would guess that increased load creates more heat than increased RPM). Therefore, an over pitched prop should have a similar engine heat output as an under pitched prop (lower load and higher RPM).

Larry
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Last edited by lr172 : 07-07-2022 at 10:19 AM.
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