Re: [PSUBS-MAILIST] OSS viewports

[Ray Keefer <Ray.Keefer@Sun.COM>]

Hi Curtis,

To relieve the stresses induced into the viewport material when machined
to size. Without annealing the viewport has weak spots that can accelerate
failures.

Get a hold of this book if you want details:

Title:	Acrylic Plastic Viewports
Author:	Jerry D. Stachiw

Pub.:	Marcel Dekker, Inc.
        270 Madison Avenue
        New York, NY  10016 
Pages:	
Year:	
ISBN:	
Cost:	$100
Synop.:	Very detailed discussion into acrylic viewports. This topic
	was Jerry's lifes work. Complete with charts and tables
	derived at via imperical tests. Including destructive
	and cyclical testing.
	
	
Regards,
Ray

> From: Subdiver05@aol.com
> Date: Tue, 8 Jul 2003 14:28:39 EDT
> Subject: Re: [PSUBS-MAILIST] OSS viewports
> To: personal_submersibles@psubs.org
> 
> I am new to this website and I am in the process of building a sub. I was 
> woundering what is the purpose of annealing. 
> 
> 
> THANKS,
> Curtis