Having served on submarines, I would have started with a propane tank, which can be delivered new and propane free for $699, not that I looked after reading the article or anything...
Having served on submarines, I would have started with a propane tank, which can be delivered new and propane free for $699, not that I looked after reading the article or anything...
In reply to oldopelguy:
That'd be a decent start to a pressure vessel 
yamaha wrote: Thanks to the sequester, I think we have found our new class of attack submarine.......its armament will consist of a single pellet gun.....
Pellets are too expensive. It will have to be BB's.
In reply to Bobzilla:
plastic bb's at that, copper and steel pellets are even too expensive.
I wish I had thought to build a submarine in high school. That would have been great at the beach.
Can you shoot flounder with plastics BB's?
Wally wrote: I wish I had thought to build a submarine in high school. That would have been great at the beach.
You just wanted to sneak up under the skinny dippers didn't you?
Adrian_Thompson wrote:Wally wrote: I wish I had thought to build a submarine in high school. That would have been great at the beach.You just wanted to sneak up under the skinny dippers didn't you?
Nahhh... like me he'd go to the submarine races. 
Adrian_Thompson wrote: Can you shoot flounder with plastics BB's?
You can but it's not very effective.
In reply to oldopelguy:
Propane tanks are rated for internal pressure, not external pressure.
Many things that are designed to hold pressure in will crush easily when external pressure is applied.
Rob R.
wvumtnbkr wrote: In reply to oldopelguy: Propane tanks are rated for internal pressure, not external pressure. Many things that are designed to hold pressure in will crush easily when external pressure is applied. Rob R.
IIRC this had been pumped full of superheated steam, and left outside on a cool day. Steam condenses, air contracts as it cools, and voila! Instant awesome!
I was almost 19 by the time I graduated. Basically, if you are born after oct 1, you have to wait a year. I was born oct 13. I started Kindergarten at almost 6.. which put me at 18 1/2 graduating HS.
In reply to mad_machine:
Our cutoff here was July 1st....I missed it by 10 days. Not that I'm complaining though, being able to drive to school grades 10-12 was awesome.
wvumtnbkr wrote: In reply to oldopelguy: Propane tanks are rated for internal pressure, not external pressure. Many things that are designed to hold pressure in will crush easily when external pressure is applied. Rob R.
Easy to fix that. Just cut the vessel in half, turn it inside out, and weld it back together.
In reply to 1988RedT2:
Weld in supports......like you know, a submarine. Its not like you'd ever want to go deeper than you could see with something you built in a shed.
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