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Post by Glenn on Jul 13, 2018 23:07:46 GMT
The forward rivnut for one of my strobe lights is loose. Has anyone else had a similar problem? I really can't understand why Tecnam has used this method to attach the nav-strobe lights to the wing tip since it is composite.
Just about any kind of blind fastener is going to be troublsome in composite construction (rivnut, nutserts, etc.). I've used these sucessfully in metal but I've had issues in fiberglass and composite. Anyone have a better idea?
Glenn
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TiPi
New Member
Posts: 28 
Home Airport: YATN
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Post by TiPi on Jul 13, 2018 23:16:08 GMT
Hi Glenn, I use rivnuts in composite and wood. The only difference is that I add some glue (5 minute epoxy) to the contact area as you can't clamp as hard with those materials as in sheet metal.
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Post by Flocker on Jul 14, 2018 13:11:50 GMT
The forward rivnut for one of my strobe lights is loose. Has anyone else had a similar problem? I had the same issue. We ended up replacing the rivnut and reinforced it with epoxy. |
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Post by Glenn on Jul 14, 2018 13:39:07 GMT
Thanks, I'll do the same and cross my fingers that it will last.
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Post by Glenn on Jul 14, 2018 13:43:48 GMT
Hi Glenn, I use rivnuts in composite and wood. The only difference is that I add some glue (5 minute epoxy) to the contact area as you can't clamp as hard with those materials as in sheet metal. I agree it needs epoxy. The original didn't expanded much. Maybe I'll be more sucessful this time. Thanks |
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Post by Flocker on Jul 15, 2018 16:35:14 GMT
The issue is that the strobe light has a flat base and the wing tip is slightly curved. You have to be careful not to over tighten the screws or the rivnut will pop out.
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Post by Glenn on Jul 15, 2018 17:03:26 GMT
The issue is that the strobe light has a flat base and the wing tip is slightly curved. You have to be careful not to over tighten the screws or the rivnut will pop out. Your observation is exactly right! It's irritating that either the forward screw can be snug or the rear but not both. Another reason why I'm baffled about Tecnam's choice of fasteners in that location. Attaching a flat object to a curved surface is asking for trouble with rivnuts...but that's my opinion. My first conditional inspection (May 2017) was done at a Tecanm Service Center and shortly after is when I first noticed the light was loose. I'd like to blame them but maybe it was just a coincidence. They see many light sports from various origins but my P2008 was the first they'd seen of that model. Glenn |
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