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primary hold down's




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From:  Esondrmn [SMTP:Esondrmn-at-aol-dot-com]
Sent:  Monday, March 09, 1998 3:23 PM
To:  tesla-at-pupman-dot-com
Subject:  Re: primary hold down's

In a message dated 98-03-07 07:25:50 EST, you write:

<< ---------
 From:  Walt Kulpa [SMTP:gwkulpa-at-earthlink-dot-net]
 Sent:  Friday, March 06, 1998 12:27 PM
 To:  tesla-at-pupman-dot-com
 Subject:  primary hold down's
 
 Hi, I'm working on the form for my 1/4" refigerator tubing primary. 
 I'm planning on using 1/4" polycarb for the support fins. I've got the 
 calculations made on where to notch the plasitc in order to create a 
 nice uniform  30degree slope and 15 degree rise with 1/4" spacing 
 between turns, but what I don't have is, what can i do for holding the 
 tubing into the notches? I don't want to just let it lay there, do I?  
 I'm not so sure that adehesive is a good idea, is it? How is holding the 
 tubing into the plastic commonly done?
 Thanks, Walt Kulpa
  >>

Walt,

I tied my copper tubing in place at each notch with waxed lacing cord.  Let me
see, I had 8 supports times 14 turns, that's 112 spot ties.  No wonder I had
cuts in most of my fingers.  Small nylon tie straps would be much easier.

Ed Sonderman

Ed Sonderman