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  #1  
Old 06-20-2018, 01:39 PM
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johngoodman johngoodman is offline
 
Join Date: Feb 2006
Location: Peachtree City, Georgia
Posts: 440
Default Spinner Cracks

We are doing our condition inspection and found some very faint cracks around the bolts that pass through the backplate, S 602B. In fact they are so faint, that we had to clean off the primer and do a fingernail test. Anybody else had this?

John Goodman
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  #2  
Old 06-20-2018, 01:50 PM
slngsht slngsht is offline
 
Join Date: May 2016
Location: Purcellville, VA
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not an RV, but my spinner on the warrior had major cracks developed - found at annual.
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  #3  
Old 06-20-2018, 02:55 PM
texdog texdog is online now
 
Join Date: Jan 2013
Location: Fredericksburg, Tx.
Posts: 186
Unhappy Spinner cracks

I have a c/S Hartzell prop on my RV6A and I had very small cracks in the corner rivets. The book says replace the backing plate for any cracks. Mine were about 1/2 inch long. 876 hours. New plate is on spinner tomorrow.
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  #4  
Old 06-21-2018, 10:27 AM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 361
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plane 1- C/S rear plate found 2 ring cracks around bolt holes.
plane 2- found one rivet missing, two others loose, between rear plate doubler and mounting plate
plane 3- C/S rear plate found crack from center hole thru to outter edge, suprisingly the doubler plate hadn't cracked (yet)

These planes rear mounting plates were replaced and props balanced, problems haven't returned in over 5 years.

plane 4- C/S front plate found cracks around bolt holes, customer complained of low RPM shimmy

This one was different, couldn't get good balance for low RPMs and finally found gross imbalance in spinner itself (Chromed aluminum), changed out spinner and re-balanced, problem cause solved.
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Maintain lots, upgraded & repaired some, modified more, rebuild a few, & built 4 of 'em
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  #5  
Old 06-22-2018, 10:12 AM
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johngoodman johngoodman is offline
 
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Location: Peachtree City, Georgia
Posts: 440
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I'm attaching a sample photo of the prop spinner assembly. They all have the same crack on both sides.
John
[IMG][/IMG]
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First flight was 25 June, 2011
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  #6  
Old 06-22-2018, 05:35 PM
Marc Bourget Marc Bourget is offline
 
Join Date: Apr 2009
Location: Stockton, California
Posts: 175
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John,

Thanks for the picture, but I'd like to see a view from a step back.

Is is possible to "color" the cracked areas with a sharpie and wipe clean for more contrast?

Thanks
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