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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: "Rich Fox" <v4gr@rcn.com>
Date: Fri, 17 Apr 2009 09:17:58 -0700
My 2008 book (new book not here YET) says "All non-stock windows and 
windshields shall be made of shatter-resistant plastic, such as 
polycarbonate (Lexan)---. Since Plexiglas is a cast Acrylic and is very much 
not Shatter resistant I believe this rules it's use out.
----- Original Message ----- 
From: "Skip Higginbotham" <saltrat@pahrump.com>
To: "James Tone" <gmc6power@earthlink.net>; <land-speed@autox.team.net>
Sent: Friday, April 17, 2009 9:04 AM
Subject: Re: [Land-speed] Drilling Plexiglass


> 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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