[PSUBS-MAILIST] Re: anymore--pressure test

[MerlinSub@t-online.de (Carsten Standfuß)]

I have not - only shallow water test with Sgt.P. 
- but will do it with CSSX in 2-3 years. 

Its a programm like : (All test with crew inside)

1.) Harbour test dive to bottom at about 33 feet (10 m). 

2.) Baltic Sea test dive to bottom at 66 feet (20 m). 
3.) Baltic Sea test dive to bottom at 164 feet (50 m). 
4.) Baltic Sea test dive to bottom at 66 feet 
    -and divers use look out chamber. 

5.) North Sea test dive to bottom at 328 feet (100 m) 
6.) North Sea test dive to bottom at 164 feet (50 m) 
   - and divers use look out chamber with air. 
7.) North Sea test dive to bottom at 164 feet
   - and divers use look out chamber filled with heliox. 
8.) North Sea deep test to bottom at 820 feet. (250 m)
9.) North Sea deep test to bottom at 1050 feet.(320 m) 
    (only two persons inside.. the welder and Andre :-) )
10.)North Sea test dive to bottom at 328 feet (100 m) 
   - and divers use look out chamber filled with heliox.
11.) Deeper diver look out test over 328 feet up to 820
     - but depents more on the divers and boats expirence 
     and will be maybe some years later.

It takes the lost of 13,5 tons bouancy - 
(10 t softtanks, 50 % of the hardtanks volume and 3 t dropweight) 
means 13,7 ts water has to leaking inside before the sub goes on the
final voyage. 
Can not believe that a leaking vale will do that in the time we need to
surface. 
Calculate collapse deep is 1640 feet. 

But still have no idear to prevent that the boat crash into 
a sailboat during surfacing. - May should I wait with diving 
manovers for a day without wind is blowing ? Or should
I use a grey bouy - looks like a WWII minehead ? 

The hit of a modern sailboat lead keel in atomic bomb style 
maybe 3-6 ts heavy - will maybe dammage my colours.. 

Carsten 

Thijs Struijs schrieb:
> 
> Jeff  Post wrote:
> 
> > Honestly folks, why all the discussion about how to build a pressure
> > chamber? No one is going to go to the huge expense for a one time test.
> > Either you find someone who can do this kind of test with their own
> chamber,
> > or you test your sub with deep water.
> 
> I agree on that. Are there any psubbers who actualy tested there sub in deep
> water? How was it done?
> 
> Thijs Struijs