RE: [PSUBS-MAILIST] Oil drum submarine

[MerlinSub@t-online.de]

Hi Jon - I am a friend of the german cameraman how made the Philipenko film. 
The boat did only the dives it did in the film and was retired complete out 
of order after the movie was set. Dive deep was 3 meter (9 feet) or so.  

In England was a guy which build also a oildrum-U-Boat - looks like a 
comic version of a Biber Oneman. Works in shallow water. 

vbr Carsten  

<jonw@psubs.org> schrieb:
> Brent,
> 
> I have to disagree with you on this one.  It's great when we can
> congratulate people who have built well designed and constructed submarines
> in their backyard, and there are many who have.  However, I think we should
> be equally zealous about openly criticizing and rejecting designs and
> construction techniques that are clearly not safe.  A cursory look at
> Xiangli's sub shows it is a text book illustration of how not to build a
> sub.  Only one publication got it right and gave the following
> synopsis..."he claims the sub should be quite safe.  Coincidentally, the
> builders of the Titanic said pretty much the same thing."
> http://ralph.ninemsn.com.au/article.aspx?id=598774
> 
> Here's a closer photo of the sub.  Note the wires from the dive planes, the
> hatch, and the hatch seal.  This photo pretty much confirms that the end
> cowel does not hold a ballast tank.
> http://www.daylife.com/photo/0fzU7CUe5QgXF
> 
> I have similar feelings about the Pilipenko sub and I think the diving video
> we were pointed to was a sad documentation of construction and testing
> techniques.  The guy goes under water and one of his viewports immediately
> starts a sizable leak.  It's obvious that he appears confused and a bit
> disorientated by the size of the leak and then the blast of compressed air
> that hits him in the face when something lets go after he overpressurizes
> it.  If that viewport had let go completely (must have been at least 8
> inches in diameter), that guy wasn't getting out of his sub.  I may alone in
> this, but my thinking is that a properly built submersible shouldn't have
> leaks when it goes underwater with a human being in it.  Something about
> that scenario always raises a question with me about the integrity of the
> vessel.  And this wasn't a case of the hatch not being closed tightly
> enough.
> 
> The fact that these two owners obviously have limited resources is one of
> the most important warnings that we as a group should be issuing.  If you
> don't have the resources to build a sub properly, don't build it.
> 
> Where are the safety concious individuals in this group?  Why the silence?
> 
> Jon
> 
>   -----Original Message-----
>   From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On Behalf Of Brent Hartwig
>   Sent: Wednesday, July 16, 2008 11:43 PM
>   To: personal_submersibles@psubs.org
>   Subject: RE: [PSUBS-MAILIST] Oil drum submarine
> 
> 
>   You have to give the guy props for making his dream happen. He's only
> planning to go to 10 meters according to the article. I would think those
> drums could take that. Perhaps he has some internal ribbing or other
> stiffeners we can't see. The end drums might be the MBT's.
> 
>   I don't really understand how the conning tower is attached and
> reinforced.
> 




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