[Spridgets] How it's made. Episode 498 Judson Rotor.

[Dean Hedin]

Torlon 4435

You can read about it here.
http://vwjudsonregister.tripod.com/torlon-vane-material.htm

I actually scanned that brochure and sent it that website.
The article refers to Torlon 7130, but that has been superseded 
by 4435.  You can get it from Drake Plastics.

You need a 12"x4"x.187" sheet for a Sprite Judson. It's about $130. 
It will most likely need to be thickness planned slightly to fit the slots. 

So don't make a mistake cutting it!
The old adage, "Cut once measure twice" definitely applies here.

There is another rocket science material that I just read about in Machine
Design magazine..  
http://www.metcar.com/index.html

Apparently they have some sort of carbon graphite designed for sliding vane
applications.  But I don't know how much it cost, where to get it, or even
know what its properties are.  Nor have I heard of any case studies of its
use.  

BTW, These are the true "Rearden Metals" of this day and age.

-----Original Message-----
From: spridgets-bounces at autox.team.net
[mailto:spridgets-bounces at autox.team.net] On Behalf Of Bob Kitterer
Sent: Wednesday, December 19, 2012 8:25 PM
To: Spridgets
Subject: Re: [Spridgets] How it's made. Episode 498 Judson Rotor.

What material are you going to use for the vanes?