Re: [PSUBS-MAILIST] Great Update on the old K-250 sub in Sandpoint

[Ian Roxborough <irox@ix.netcom.com>]

Using polycarbonate would be either too risky (very little data)
or too expensive (cost for the safety research) when compared
to Acrylic.  Much research has been done on Acrylic and it's
relatively cheap be buy the findings.  Even if polycarbonate
had the same amount of data avaliable, I would still choose
Acrylic because it will turn milky long before failing, where
as polycarbonate would fail without warning.

Cheers,
 Ian.

On Wed, 07 Feb 2007 06:30:34 -0800
"Brent Hartwig" <brenthartwig@hotmail.com> wrote:

> Fantastic,    It's nice to know we have good options.  Are these view ports just the glass or the glass and the metal framework? I'm thinking I might like to use polycarbonate for a number of reasons. But I need to do a list of pros and cons compared to acrylic. There is a number of different brands and types in those brands that most have different advantages to compare as well. It's like going to school. So you could say I need to be schooled. : )'
> 
> Brent
> 
> ------------------------------------------------
> From: "Jon Wallace" <jon@psubs.org>
> Reply-To: personal_submersibles@psubs.org
> To: <personal_submersibles@psubs.org>
> Subject: RE: [PSUBS-MAILIST] Great Update on the old K-250 sub in Sandpoint
> Date: Wed, 7 Feb 2007 08:00:29 -0500
> 
> Hi Brent,
>  
> I'm currently in talks with a manufacturer of certified ASME PVHO view ports to offer these through PSUBS.  I have no idea what they would cost, but it's an option you might consider if you choose to replace the view ports.
>  
> Jon
>  
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Brent Hartwig
> Sent: Wednesday, February 07, 2007 3:19 AM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Great Update on the old K-250 sub in Sandpoint
> 
> 
> Great data Ian, thank you much. As I recall the scratches were really light so we will see what we got once we have them out. I didn't think about them soaking up water,interesting. I used to know allot more about annealing when I was working on designs for small animal enclosures, but I'll have to dig that data out of my brain and filing cabinet and refresh.  The two small view ports have a large bevel on them that would require turning them on a lathe if we need to make new ones. Having the old ones will make it easier to copy them.  I have a lathe that should be able to do this for us.  The basic circle can be water jet cut out of the sqare sheets here locally very quickly and for a good price.
> 
> Regards,
> 
> Brent
> 
> ************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************



************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************