Re: Unmanned test dives, a safty question

[Alan Long <subview@mediaone.net>]

Jon,

One other thing about divers in the water during a drop test,  when I was doing a
preliminary destruction test on one of my view ports which I did in a 2 in thick
steel
pressure chamber, When the pressure got up to 760 psi the port gave way and let me
tell you, It sounded like a gun shot !!!  and that was just a view port,  I would
not want to be any where in the water if a sub failed !!!  Like you said, Thoomp
!!! wow...

Jonathan Shawl wrote:

> Alan Long wrote:
>
> > Jon, Silly question but, just exactly how close were the divers to the sub as
> > it
> > went down ?
>
> No, not silly. I'm glad you brought it up.I thought they were too close! I was
> not on the dive and didn't know how close the divers were till I saw the video
> later.What worried me most was when I saw they went KLUNK into the view port
> with the video camera. Yikes, not a good idea!
>
> > What is a safe distance if at all.  If the sub gives... BIG BADA BOOM !!!
> > Safty first !!!
>
> That is one I can't answer for sure. But I would say far enough that you
> wouldn't get sucked in. Besides, someone else said it was more like thoomp.
> ;-)Yes, Safety first !!!
>
> > Jonathan Shawl wrote:
> >
> > > EdwMullin@aol.com wrote:
> > >
> > > > How does someone dive their submersible, unmanned, for testing purposes?
> > >
> > > I think a barge with a crane is the best way .  I tied on a 1/2 nylon line
> > > and added extra weights to replace me. Then with divers and a video camera
> > > (optional), we lowered it down to 140' (the bottom). Then the divers put a
> > > little air in the ballast tanks and it surfaced.
> > > SAFETY NOTE: Remember it will fall fast if it implodes on the way down, so
> > > don't get yourself or the boat tangled to the line! This line was to mark
> > > the sub's location if it failed.
> > > Jon Shawl