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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Tue, Jun-20-2017, 05:08:20 PM   #1
The Producer
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Default LTW Wing composition and repair q's

Hey guys - I know there are several resident experts here when it comes to LTW wings. Through good fortune I've acquired this broken one.

Any recommendations for repair before I simply drop off at a body shop and hope for the best? Westopher wondered of an aircraft structures shop might be the place to go. The breaks are very clean, and being the lower tray, I hope not really structural. There are a few shops like this out by the regional airport that I thought about dropping in to.

There is also one small corner of the upper wing that will need to be shaped from scratch - not sure what the best way would be to build up some material there that can be shaped back down.

Thoughts? I'm open to ideas

Thanks!

Ltw1 by GhstRidr, on Flickr

Ltw1 by GhstRidr, on Flickr

Ltw1 by GhstRidr, on Flickr

Last edited by The Producer; Sat, Jul-01-2017 at 04:04:13 AM.
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Old Wed, Jun-21-2017, 05:20:47 AM   #2
westopher
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Default Re: LTW Wing composition and repair q's

JIM E????? BRAYMOND???? Where art thou?
I'm shining a BMW motorsport light in the sky over California.
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Old Wed, Jun-21-2017, 08:25:27 PM   #3
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Default Re: LTW Wing composition and repair q's

I'd be interested to hear thoughts on this, as I too have a damaged wing in my storage unit right now. I think it's a polyurethane mix. Boat repair shops might be an option, but I feel like if you find a top tier auto body shop, they should be able to handle it no sweat.
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Old Fri, Jun-30-2017, 05:26:30 AM   #4
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Default Re: LTW Wing composition and repair q's

hmm - thought I'd hear a little more on this subject.

going away for a couple of weeks, will hit some bodyshops on my return
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Old Fri, Jun-30-2017, 07:30:43 PM   #5
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Default Re: LTW Wing composition and repair q's

Can't see your pictures for some reason but a good aircraft repair place will have fiberglass/ carbon fiber skills. I've toured Duncan aviations facility and was amazed by the stuff they create
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Old Fri, Jun-30-2017, 08:03:49 PM   #6
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Default Re: LTW Wing composition and repair q's

I have a damaged OEM LTW spoiler as well. Mine has several cracks on the base. My main concern is how the repaired wing will handle the impact of the trunk be opened and closed.
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Old Sat, Jul-01-2017, 04:05:34 AM   #7
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Default Re: LTW Wing composition and repair q's

Quote:
Originally Posted by Dr Ed View Post
I have a damaged OEM LTW spoiler as well. Mine has several cracks on the base. My main concern is how the repaired wing will handle the impact of the trunk be opened and closed.

This is my concern too - trunks only going to get heavier (could get the upgraded trunk shocks)
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Old Wed, Jul-12-2017, 10:01:05 PM   #8
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Default Re: LTW Wing composition and repair q's

The material appears to be a type of Polyurethane. The material on mine is, therefore I'm inclined to believe it is. The following is what my approach would be...

For bonding the breaks you want to use a cyanoacrylate. Other adhesives could be used with limited success, but would require softening the foam with a solvent which could (and will) damage the foam if not handled properly. See the below source for adhesive and tips.

http://www.permabond.com/materials_b...-polyurethane/

Now for building the corner of the top depends on how good you are with a Dremel. Buy some casting urethane (Shore 75), build a small "moat" around the area you want to build up, mix and pour the necessary amount of urethane, let dry, then finish with shaping to size. Sand to a smooth finish then cover with gel-coat. Sources for said materials are listed below:

http://www.fibreglast.com/product/ur...re-d/urethanes

http://www.fibreglast.com/product/wh...lyester_Resins
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Old Wed, Jul-19-2017, 03:59:41 AM   #9
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Default Re: LTW Wing composition and repair q's

^^ just got back from holidays and saw this informative reply ^^

thanks for posting the links - I'll do some more research.
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Discussing LTW Wing composition and repair q's in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)