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  #11  
Old 04-19-2022, 09:37 AM
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Tony_T Tony_T is offline
 
Join Date: Dec 2008
Location: Lacey, WA
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Default Hinge smoke

The first picture is typical of hinge smoke after a couple hours of flying with the Sensenich prop and dynamically balanced. The second picture is after many hours of flying with the fixed pitch 3-blade Catto. I have over 30 hours now with the Catto and have yet to see any hinge smoke. The Catto is amazingly smooth running. I know not everyone will want to go out and spend a bunch of money on an expensive prop but vibration kills everything eventually. Could be worth the money in the long run.
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  #12  
Old 04-19-2022, 08:12 PM
funflying funflying is offline
 
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Tony is the Catto prop balanced?
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  #13  
Old 04-19-2022, 08:57 PM
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Quote:
Originally Posted by funflying View Post
Tony is the Catto prop balanced?
Not dynamically balanced on my airplane, yet. I plan to check that next month at annual time. Will it need any weights? Pretty sure it won't.
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  #14  
Old 04-20-2022, 11:02 AM
RandomSquawk RandomSquawk is offline
 
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Location: Skagit County, WA
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Quote:
Originally Posted by Tony_T View Post
...fixed pitch 3-blade Catto....the Catto is amazingly smooth running.
Tony, do you have a link to that specific product? The Catto web site is not helpful.
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  #15  
Old 04-20-2022, 01:54 PM
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Tony_T Tony_T is offline
 
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Quote:
Originally Posted by RandomSquawk View Post
Tony, do you have a link to that specific product? The Catto web site is not helpful.
They do not have the RV12 propeller package currently on their website. I recommend emailing them or call their phone number and talk to Nicole (Catto) Klith. She is director of sales and handles the RV12 propellers. She will know what you are calling about and can answer questions, 209-754-3553 - info@cattoprops.com
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  #16  
Old 04-21-2022, 01:13 AM
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Can anyone show a picture of the broken hinge?


Is it the same hinge eyelets that are wearing and breaking?


Is there a fix during the build which would prevent this?
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  #17  
Old 04-21-2022, 01:41 AM
seagull seagull is offline
 
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Location: Highland, CA
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Quote:
Originally Posted by KiloFoxtrot View Post
Can anyone show a picture of the broken hinge?


Is it the same hinge eyelets that are wearing and breaking?


Is there a fix during the build which would prevent this?
Typically the co-pilot side is where the most vibration/ wear occurs. See post #3 of this thread for the repair.
There are 2 types of hinge material. One has rolled eyes the other has machined eyes. The machined ones are far superior and can be bought from Spruce. If I was building that is all I would use.
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  #18  
Old 04-21-2022, 02:34 AM
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Piper J3 Piper J3 is offline
 
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Quote:
Originally Posted by seagull View Post
Typically the co-pilot side is where the most vibration/ wear occurs.
I wonder why co-pilot side? P-factor from prop? Turbulence from protruding round exhaust stack? Air turbulence around/thru cowl opening for exhaust stack?
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  #19  
Old 04-21-2022, 05:26 AM
blythet blythet is offline
 
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Location: selma, NC
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I think it's because the pilot's side is stiffened by the fiberglass air ducting. No such support on the right side.
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  #20  
Old 04-21-2022, 09:45 AM
seagull seagull is offline
 
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it could be the antinode of the vibration occurring at cruise RPM.
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