Return-Path: <lancair.list-request@olsusa.com>
Received: from olympus.net ([198.133.237.1]) by truman.olsusa.com
          (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35)
          with ESMTP id com for <lancair.list@olsusa.com>;
          Fri, 25 Jun 1999 02:38:01 -0400
Received: from ptpm159.olympus.net ([198.133.237.189] helo=2thman)
	by olympus.net with smtp (Exim 2.02 #1)
	id 10xPfY-00024a-00
	for lancair.list@olsusa.com; Thu, 24 Jun 1999 23:41:01 -0700
Message-ID: <004901bebed6$a6f7f7a0$bded85c6@2thman>
From: "Barrett/Burns" <2thman@olympus.net>
To: "Lancair List" <lancair.list@olsusa.com>
Subject: Taxi Lights
Date: Thu, 24 Jun 1999 23:47:48 -0700
X-Mailing-List: lancair.list@olsusa.com
Mime-Version: 1.0

          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>
Dear Marv,
I see several guys are interested in taxi lights.

I think I recall you said you'd done some cutting of glass in your business.
If so, can you give me some insight on how to do that?  I've cut out the
leading edge for a small light I've found but I think I'd like to leave the
lens attached and insert the entire contraption if possible.  I think maybe
Fred Moreno has found a way to do this.

The lights I found are compact, but the lenses are bonded to the metal
reflector housing and there is about a 3/16" glass/metal flange around the
outside.  If I could grind off 1/8" of this, I think I can slip it right
into the space I've got in the leading edge outboard the fuel cell.

I have a diamond tile cutting saw (wet) and I wonder if that would do the
trick?

Regards,

John

[A typical glass cutter does its job by scoring one surface of the glass
which provides a place for the stress to be relieved to when you flex the
material away from the score.  It works great when you have plenty of 
surface area to deal with on both sides of the score.  It is possible to 
score and get a clean break on glass when the score line is at least 1.5
times the thickness of the glass away from an edge... this takes a very 
sharp cutting wheel and plenty of lubrication to keep it from getting hot.
There is no way for you to 'cut' material away from around the edges of 
that little circle using a standard rotary glass cutter and the score and
break technique.  You _can_, however, grind the material away from the
edge using a belt sander fitted with a silicon carbide belt of about 120
grit but it will be a long process and there will be significant heat 
generated during the grinding.  Your wet diamond saw should do the job 
admirably... go slowly and be sure to keep the coolant flowing over the
work and you should wind up with nice unchipped polished edges.  

I hope this helps.      <Marv>   ]

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML homepage:   http://www.olsusa.com/Users/Mkaye/maillist.html