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Race Car Fabrication There is a lot of cool fabriaction going on the race car industry, show us what you got.


Race Car Fabrication There is a lot of cool fabriaction going on the race car industry, show us what you got.

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  #1  
Old 07-19-2017, 05:59 PM
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Redliner Redliner is offline
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VIDEO: How to make a giant race car wing

https://www.youtube.com/watch?v=laR2C55b8AA
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Old 07-19-2017, 06:20 PM
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Did you use PVA on those? I saw wax & polish and then gelcoat before laying down resin and weave. It looked like it released easily and the finish was very nice. The finished product looked great!

How much weight do you suppose that foam added? Pardon my ignorance but I would have thought that hollow section wing shape would have been sufficiently strong and stiff without it.
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Old 07-19-2017, 06:37 PM
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I chose to not use PVA release in making the brown molds off my die, aiming for a flawless finish, just 5 coats of wax on & wax off. In making the grey copies out of those molds I went back to my usual practise on using PVA as well. The multiple coats of wax are only needed to season a new mold. After that just one coat of wax each time maintains that wax layer in the molds.

The pouring foam would add almost nothing in weight. Yes You could just make the wing strong enough without the foam as a hollow product, but the foam is (IMHO) the best way to cement the two halves together & adds incredible strength.
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Old 07-19-2017, 06:49 PM
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Thanks for the reply and info! Do you go back and do something along the seam where the two halves come together?

Really nice looking finish on that part. Thanks for filling my brain for the afternoon :)
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Old 07-19-2017, 07:23 PM
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Yes the seams are lightly sanded and finished with car bog as needed.
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Old 07-20-2017, 03:06 AM
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Punk Steel Punk Steel is offline
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fascinating to see how you did that, I dont think many people appreciate how much of a long series of processes GRP work is, especially if you are making a mold and buck too.
And thank you for the sound of that GRP B audi at the beginning.
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