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RE: [PSUBS-MAILIST] Ballast ratio to subs weight?
does it have the reinforced steel bands?
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Bob Decker
Sent: Wednesday, June 05, 2002 9:41 AM
To: 'personal_submersibles@psubs.org'
Subject: RE: [PSUBS-MAILIST] Ballast ratio to subs weight?
Graham
I assume these side tanks will be bottom venting open ballast tanks,
simailer to U boats. if so first you will need to calculate total
displacement of sub with your current concept ballast tank included and full
of air. the dispacement weight should be less then the volume weight(+ 25%
for saftey) of the water the sub displaces.if the sub weighs more,increase
ballast tank size and recalculate. then caculate displacement weight without
the air in tanks to see if sub weighs more then the water. you can never
have too much extra bouyance in your ballast tank. one suggestion. think of
lining ballast tank with an nylon ripstop air blatter, like a diver DC unit.
You never know you what could happen. if you find your self upside-down your
ballast tanks would still work. the pipe thickness you described for the
hull should be good to 500 or 600 ft, the ballast tank may be thicker then
you need. unless you need the weight for displacement. as a note the sub I
designed has a 3/8" thick hull with a crush depth of 800ft and a working
depth of 250Ft. I also would suggest building 2 hulls, one to test and crush
and one to use.
Good luck.
Bob Decker
-----Original Message-----
From: Graham K [mailto:cryogenicz@dsl-only.net]
Sent: Wednesday, June 05, 2002 6:59 AM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Ballast ratio to subs weight?
I didn't know I had to describe my entire design, so all of you can
completely scrutinize it.
thanks.
for nothing.
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Dan h
Sent: Wednesday, June 05, 2002 4:54 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Ballast ratio to subs weight?
Graham,
Do as you please. It's your time, money and LIFE!!!!!
It sounds like good advice you were given. We have no idea the amount of
research and calculations you put into your hull design, but it sure doesn't
sound like your ready to order the hard goods yet. So far you posted
several
depths, a hull diameter and thickness. A hull is more than a big piece of
pipe. Are you installing frames in it?
6404 feet is mighty deep!
No one here is trying to discourage you from the project, but please "don't
jump
in before you learn to swim."
Dan H.
Graham K wrote:
> I am trying to get a quote, I was going to order it as soon as I received
> the price. as I said, ORDERING, not ordered. I was merely going to order
the
> main hull, I knew what size of hull, I just wasn't sure on the ballast
> sizes... I am trying to get the Busby book. Once I receive that material,
I
> will get the rest of the steel. (ballast steel
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Jeff Post
> Sent: Tuesday, June 04, 2002 8:50 PM
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Ballast ratio to subs weight?
>
> Sounds like you need a Busby bad!!
>
> How is it you would be ordering steel if you have no idea what it takes to
> float or sink a sub? This is serious! It is one thing to scratch out a sub
> on paper and not have a clue about the principles of submarines, but it is
> entirely another to construct a sub when you have no idea what you are
> doing. You could very successfully kill yourself!
>
> I'm sorry to be so harsh. I hope you are fibbing about ordering the steel.
> You need to go to the library, or surf the web. Seriously, look in the
> archives about all the discussions about "Busby's", I hear there are
plenty
> for all.
>
> JP
>
> ----- Original Message -----
> From: Graham K <cryogenicz@dsl-only.net>
> To: <personal_submersibles@psubs.org>
> Sent: Tuesday, June 04, 2002 10:27 AM
> Subject: [PSUBS-MAILIST] Ballast ratio to subs weight?
>
> > how do you know your subs going to float? how do you know you have
enough
> > ballast buoyancy?
> >
> > Regards,
> >
> > Graham
> >
> > -----Original Message-----
> > From: owner-personal_submersibles@psubs.org
> > [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Alec Smyth
> > Sent: Tuesday, June 04, 2002 7:45 AM
> > To: 'personal_submersibles@psubs.org'
> > Subject: RE: [PSUBS-MAILIST] Thru hull Seals
> >
> >
> > Graham, that's a heck of a depth. Please do tell us what you're up to! I
> > apologize if I've missed out on some earlier posting.
> >
> > cheers,
> >
> > Alec
> >
> > -----Original Message-----
> > From: Graham K [mailto:cryogenicz@dsl-only.net]
> > Sent: Tuesday, June 04, 2002 1:22 AM
> > To: personal_submersibles@psubs.org
> > Subject: [PSUBS-MAILIST] Thru hull Seals
> >
> >
> > I have been looking for a hull Seal supplier for my sub, I would the
> bearing
> > seal to be able to have its crush depth around 2852 PSI, 6404 Feet.
Anyone
> > know of a online supplier, or someone with a telephone number or
website?
> >
> > Regards
> >
> > Graham
> >