Re: [PSUBS-MAILIST] Re: Propane tank

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

Sorry, I didn't mean to undermine your calculation, I was
just implying that without examining the pressure-vessel
nobody on this list can accurately predict the crush
depth, we don't even know the diameter (althought your
40inich guess would seem like a good guess).

I'd be interest in how you where accounting for rust
and weakness in your calculation.

Thanks,

Ian.


On Wed, 4 Sep 2002 11:51:57 +0900
"Problah" <problah@zonenet.net> wrote:

> Wow, thanks for the support fellas, but I did do a calculation accounting for 
> rust and a higher flexibility (weakness). The absorption was a good note 
> thoe, I'll give you that, I just figured for crush depth, not for diving in.
> 
> Support your local zonenet
> 
> 
> ---------- Original Message -----------
> From: Ian Roxborough <irox@ix.netcom.com>
> To: personal_submersibles@psubs.org
> Sent: Wed, 4 Sep 2002 11:13:40 -0700
> Subject: [PSUBS-MAILIST] Re: Propane tank
> 
> > Hi Mike,
> > 
> > if you don't have access to resources to make a 1-ATM
> > submarine, have you consider making an ambient sub
> > instead.
> > 
> > I'm not saying that ambient subs are easier to build
> > than 1-ATM subs, but it does remove the issue of finding
> > a safe pressure vessel to use.  After learning more
> > about ambient subs at the psubs conference I think they
> > look like a LOT of fun.
> > 
> > You don't mention a lot about the propane tank you want
> > to use, any estimation of crush depth that people have
> > give on this list will be working with the assumption
> > that the propane tank is new and in perfect condition.
> > I'm sure you are aware that any small (invisible) cracks
> > or dents could drastically reduce the usable strength
> > of the propane tank.  If it is a used propane tank, then
> > you'll have to deal with the propane that has been absorbed
> > by the metal.
> > 
> > Ian.
> > 
> > On Mon, 2 Sep 2002 22:39:23 -0500
> > majerus@iowatelecom.net wrote:
> > 
> > >     To anyone that might know, 
> > >         I have a 500 gallon propane tank with a .312 thousands thickness 
> and was wondering if that might be able to stand pressure of 75 feet or so, I 
> know that some are not keen on using one but I really want to build a sub but 
> do not have some of the resources that some might have. Also, I was wondering 
> how to make a depth gauge.
> > >         Thank you, Mike
> > > 
> > > 
> > 
> > -- 
> > The moon ate the sun on Monday and it was an awsome sight to see.
> ------- End of Original Message -------
> 


-- 
The moon ate the sun on Monday and it was an awsome sight to see.