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Re: [Land-speed] Drilling Plexiglass

To: James Tone <gmc6power@earthlink.net>,<land-speed@autox.team.net>
Subject: Re: [Land-speed] Drilling Plexiglass
From: Skip Higginbotham <saltrat@pahrump.com>
Date: Fri, 17 Apr 2009 09:04:37 -0700
JD,
Paragraph 3.U suggests LEXAN but does not appear to disallow any 
plastic..........to what do you refer? Rich is right, LEXAN is much 
more forgiving.

Thanks,
Skip


At 07:03 AM 4/17/2009, you wrote:
>I'm not sure but I think "plexiglass" in not allowed. I believe 
>"Lexan" (GE Patent)  cast acrylic, or certain Polycarbonates (SP?) 
>is allowed as Rich says.
> >
> >Most windows in my car are Lexan which is much more forgiving. 
> When drilling
> >Plexiglas (cast Acrylic) I use center or spotting drills. Works well.  RF
> >----- Original Message -----
> >
> >
> >
> >> There are many Plexiglas windscreens in LSR. That material is always at
> >> risk
> >> of cracking when drilling. To lower the risk you never drill it cold,
> >> always
> >> ensure it is warm first. The video shows why a drill causes a cracking
> >> problem and how to modify it to lower the risk.
> >> http://www.eaa.org/video/homebuilders.html?videoId=19802261001
> >>
> >>
> >>
> >>   -Elon
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