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Old 06-02-2021, 07:48 AM
catmandu's Avatar
catmandu catmandu is offline
Join Date: Dec 2005
Posts: 968
Default Spinner wear only at hub?

A nice crack popped up on my spinner, so I planned my standard fix of backing the area with some carbon fiber thread to strengthen it and fill on the top. Upon removal of the spinner, I found that the area right next to the leading edge of both FP prop hubs have an approximately two inch wear strip from the front bulkhead, as if the bulkhead is slightly oval in shape, with no wear anywhere else around the circle of the spinner. Seems kind of coincidental to have it on both sides, any particular reason for this?

Mike C.
Sierra Nevada
RV-6A bought flying

Last edited by catmandu : 06-02-2021 at 02:39 PM. Reason: terminology
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Old 06-02-2021, 08:25 AM
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rvbuilder2002 rvbuilder2002 is offline
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,453

I have seen this when no screws were installed in the fwd. bulkhead.
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.

Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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Old 06-02-2021, 02:37 PM
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catmandu catmandu is offline
Join Date: Dec 2005
Posts: 968

Six screws for the forward bulkhead. Maybe those 25 year old plate nuts need replacing to tighten things up.
Mike C.
Sierra Nevada
RV-6A bought flying
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Old 06-03-2021, 02:33 PM
SPB W10 SPB W10 is offline
Join Date: May 2018
Posts: 32

Check the "legs" of the nut plates for cracks. We found all of them broken on the long leg fixed nutplates. This was an aluminum spinner composite bulkhead combination on 180 hp Lycoming.
Steven B.
1980's RV-3 & RV-4 Build Support
Lincoln, NE
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