Saturday, February 21, 2009

Is this thick enough?

8 layers of 5.6 oz "S" glass ends up being roughly 1/16" thick. Hmmm...I'd like it to be about twice as thick just for peace of mind but just 8 layers feels awfully tough.

I can bend this sample about 1/4" with my bare hands; certainly couldn't fold it without a vice and some pliers. But is it enough?

Addendum A user going by the handle 'monkey' frequents the Caferacer.net forums who does a lot of this stuff professionally. His current race tank build up process just uses 3 layers of 200g Carbon, and thinks this is more than enough, even 'gnarly': http://www.caferacer.net/forums/topic.asp?TOPIC_ID=9756

2 comments :

  1. ant,

    8 layers is a lot of woven glass. I think it's plenty.

    have you ever seen that random 'chopped' glass that comes in mats? I think
    the boat people use it a lot. it's like a thick mat and the chopped fibers
    are about 2" long all in every direstion (good for shear). the mat is about
    0.10 thick. I'm sure 8 layers will be fine - not bullet proof but will hold
    gasoline. Yopu probably wouldn't like it if it is to withstand a really good
    poke (like in a crash from a 1959 pontiac...)

    tank plug looks great!

    dt

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  2. No plans on 1959 pontiacs getting in my way, although Toyota Prius drivers currently own the worst driving reputation in these smug bay area parts. I think given their lightweight construction, my bike will bounce off of them rather than getting squished.

    Thanks for the structural review!

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