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ACRO E-mail Archive Thread: [IAC-L:1660] Re: Citabria rib nails

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ACRO E-mail Archive Thread: [IAC-L:1660] Re: Citabria rib nails


Thread: [IAC-L:1660] Re: Citabria rib nails

Message: [IAC-L:1660] Re: Citabria rib nails

Follow-Up To: ACRO Email list (for List Members only)

From: Greg Young <gyoung at>

Date: Sat, 01 Nov 1997 02:17:43 UTC


 Steve Stratton wrote:
> ... Loosing these nails sure doesn't seem good, but I am unaware of > any real problems caused by them.

The problem is that the loss of the nails allows the ribs to "float" on
the spar.  The spar passes thru a hole in the ribs and the sharp edge of
the rib above and below the spar will cut across the grain and weaken
the spar.  There is a limit (1/16" I think) on the acceptable depth of
the damage before the spar must be repaired or replaced.  

Not good if you're flying and not fun to fix.
Greg Young gyoung at


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