Re: [PSUBS-MAILIST] Reverse engineering

[Coalbunny <coalbunny@onewest.net>]

Could I ask for those formulas as well?
Carl


Eliezer Rodriguez wrote:
> 
> Oops I forgot that detail. Yes, please send it to eliezer_rodriguez@hp.com
> 
> Regards,
> 
> Eliezer Rodriguez
> "The only thing in life to fear is fear itself."
> 
> >From: Alec Smyth <Asmyth@changepoint.com>
> >Reply-To: personal_submersibles@psubs.org
> >To: "'personal_submersibles@psubs.org'" <personal_submersibles@psubs.org>
> >Subject: RE: [PSUBS-MAILIST] Reverse engineering
> >Date: Tue, 4 Dec 2001 11:22:39 -0500
> >
> >Eliezer,
> >
> >I tried, but the email bounced. I notice you have a hotmail address, and
> >the
> >attachment is 1.7MB, so maybe it exceeds what Hotmail allows. D'you have
> >another email I can send this to?
> >
> >- Alec
> >
> >-----Original Message-----
> >From: Eliezer Rodriguez [mailto:eliezer_rodriguez@hotmail.com]
> >Sent: Tuesday, December 04, 2001 11:10 AM
> >To: personal_submersibles@psubs.org
> >Subject: RE: [PSUBS-MAILIST] Reverse engineering
> >
> >
> >Alec;
> >
> >Could you also send me copy of these formulas?
> >
> >Eliezer Rodriguez
> >"The only thing in life to fear is fear itself."
> >
> >
> >
> > >From: Alec Smyth <Asmyth@Changepoint.com>
> > >Reply-To: personal_submersibles@psubs.org
> > >To: "'personal_submersibles@psubs.org'" <personal_submersibles@psubs.org>
> > >Subject: RE: [PSUBS-MAILIST] Reverse engineering
> > >Date: Tue, 4 Dec 2001 10:32:01 -0500
> > >
> > >Uh-Oh, this is the famous plastic coke bottle question again. Take one of
> > >those and fill it with compressed air, and you will find it withstands
> > >hundreds of psi. But take it underwater with you on a scuba dive
> >(external
> > >pressure) and it will collapse before you know it. External pressure
> > >resistance is NOT calculated from internal pressure resistance. They are
> > >two
> > >entirely different things.
> > >
> > >I'm afraid the "formula" for external pressure is actually a number of
> > >pages
> > >worth, because it depends on lots of variables like diameters, length,
> > >material, etc., etc. You can readily calculate the depth rating of
> > >cylinders
> > >and speres, but anything else is hard. I'll send you scans of all the
> > >formulas off list, and the spreadsheet on PSUBS automates the same
> > >calculations.
> > >
> > >"Reverse engineering" is something quite different. That refers to taking
> > >something apart and creating the design from the finished product, rather
> > >than building a product from a design. When I was an engineering student
> >in
> > >Argentina, one of my colleagues worked at a tank factory. His assignment
> > >was
> > >to take the fire control circuitry from a Leopard II tank (purchased from
> > >Germany) and figure out the design so replicas could be built without
> > >paying
> > >the royalties.
> > >
> > >cheers,
> > >
> > >- Alec
> > >
> > >-----Original Message-----
> > >From: Floridarobots@aol.com [mailto:Floridarobots@aol.com]
> > >Sent: Tuesday, December 04, 2001 8:29 AM
> > >To: personal_submersibles@psubs.org
> > >Subject: Re: [PSUBS-MAILIST] Reverse engineering
> > >
> > >
> > >
> > >
> > >Question.....  What is the formula to calculate reverse engineering on a
> > >pressure hull ?
> > >
> > >If a Co2 tank is rated for say 1000 PSI of outward pressure from the
> > >inside,
> > >what would it be rated for  as far as pressure from the outside ? Sorry
> >if
> > >this sounds like a dumb question, Im not sure if there is a calculation
> >for
> > >this....
> > >Tom
> > >
> >
> >
> >_________________________________________________________________
> >Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
> 
> _________________________________________________________________
> Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

-- 
"The plain meaning of the right of the people to keep arms is that it is
an individual, rather than a collective, right and is not limited to
keeping arms while engaged in active military service or as a member of
a select militia such as the National Guard." - U.S. vs. Emerson, 5th
Circuit Federal Court- published October 16, 2001