Re: Unmanned test dives, a safty question

[Alan Long <subview@mediaone.net>]

Hello again Jon,

Well maybe it wasn't as load as it seemed, you see, this was my first destruction
test and I was exited and not sure what to expect,
it took me by surprise!  It sure did seem load... anyway...

The "bang" was just the port.
The test chamber is about 3 ft in length and 18 in. dia.. It belongs to my friend
Doug Previtt of Delta Oceanographics.
I feel very lucky to have access to his facilities, He is a very nice guy.  He
has been building subs (about 7 or 8) for over 35 years.
His sub, the Delta has over 4000 dives all over the world with a perfect safety
record.  He has dove for many government agencies and institutions, and on, and
on, and on...  I think you get the idea.

When I was a kid my hero was Clint Eastwood.
As an adult... sorry clint, doug has you beat !
He has done in his life what I am just beginning.

Sorry, back to the subject.

The view port I was testing was a flat, acrylic disc, 1 in. thick, flat bearing
surface flange, I.D. of 6 in, O.D. of 8. this of coarse gives me a DO/DI ratio of
1.333 which is above the minimum 1.25 acceptable. I needed the port to maintain
to 675 psi to get my safety factor of 5 and it blew at 760 psi which puts the
depth at 1707 ft.  My operating depth goal is 300 ft. so I'm in the green !.
Oh yeah, the port I tested was not even annealed, even better because the ports I
use will be.

Do you know anything about how to make a good port annealing oven ?
ttyl
Alan Long
Subview
Jonathan Shawl wrote:

> Alan Long wrote:
>
> > Jon,
> >
> > Of coarse the chamber was water filled !
> > What did I say that made you feel I was using air ???
> > >It sounded like a gun shot !!!
>
> I didn't think it would be that loud if it was a small water filled test rig.
> I guess I made an assumption, sorry about that.
> Was the bang just from the cracking or exploding plastic view port?
> How big was the water filled chamber? volume?
> How big was the lens?