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Re: [PSUBS-MAILIST]-pressure test/vacuum



This absolutely not correct.
 
Something buried in a hole 33 deep is not subjected to the weight of all the material on top of it. I'm quite sure the weight would be distributed in various ways to the sides of the hole. Another important feature  of water is that it will exert pressure uniformly on all the surfaces of the hole; something you surely can't say about burying your sub in a hole.
 
Certainly digging a deep hole and filling it with water would work, but again, isn't this rather silly. Why do things the hard way? How hard do you think digging a hole 100' deep is? Do you think it would be easy or economical?
 
Honestly folks, take your sub to the water. Follow Carsten's example from below.
 
Or, maybe Carsten is going to dig a hole 1000' deep? Please put those pics on the web when you do that!
 
JP
----- Original Message -----
From: AndrePevestorf@aol.com
To: personal_submersibles@psubs.org
Sent: Friday, April 12, 2002 10:11 AM
Subject: Re: [PSUBS-MAILIST]-pressure test/vacuum

Well, but if you dive in lets say mercury then you have a .16 times higher ???..( Damn!! I´m nothing without my books and tables...grrr)
Than you will have a quite higher pressure when in 33 feed deep...

THIS IS STUPID !!! Nobody will ever dive in a mercury lake...

But consider the principle... If you have a lot of sand for free and can rent a digger and dig a hole 33 feed deep put the sub in and fill it with sand the pressure on the sub could be the same as in 100 or more feet water deep... (I´m not a civil ingineer but the have formulars to calculate the "earth-pressure")
It sounds crazy but it will works.  You can also use concrete but than it is crazy indeed !!!  :-))

With this method ( I will never advise this honestly ) the statement: "Of course I have build my sub for searching for treasures" gets a total new interpretation .... particulary if you forgot where you sub "lies"...

Search for a lake or dig a hole and............fill it with water ....

A.