[PSUBS-MAILIST] VBT for K-350

[Jon Wallace]

STD pipe...but I don't recall the thickness off the top of my head.

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On Tue, 12/17/13, jimtoddpsub at aol.com <jimtoddpsub at aol.com> wrote:

 Subject: Re: [PSUBS-MAILIST] VBT for K-350
 To: personal_submersibles at psubs.org
 Date: Tuesday, December 17, 2013, 10:40 PM
 
 
 Bob et al,
 
  
 
 What's the standard wall thickness
 on the K-boat VBT?  Is it approved procedure to weld
 extra material at the [water valve/drain plug] site before
 threading it?  If so, it seems it would be possible to
 have the insert flush with the interior wall.  At least
 it wouldn't project where it could interfere with
 draining of the tank and would make it easier to
 flush.
 
  
 
 Thanks,
 
 Jim
 
  
 
  
 
 
 
 
 
 -----Original Message-----
 
 From: Bob Travis <bobtravis at comcast.net>
 
 To: Personal Submersibles General Discussion
 <personal_submersibles at psubs.org>
 
 Sent: Tue, Dec 17, 2013 4:26 pm
 
 Subject: Re: [PSUBS-MAILIST] VBT for K-350
 
 
 
 
 
 
 
 
 
 
 Thanks for the input!!  I think I'm going to
 try a stainless plug. I'll let you know how it
 goes. 
 
 
 
 Sent from my iPhone
 
 
 
 On Dec 17, 2013, at 6:58 AM, James Frankland <jamesf at guernseysubmarine.com>
 wrote:
 
 
 
 
 
 
 This has given me an idea.  Ive got loads of this
 fluid film stuff.  Im tempted to pour some into the
 tank to give it a bit of protection over the winter. 
 Might have to experiment with it a bit first to make sure
 its not going to clog it up.
 
 
 
  
 
 
 http://www.fluid-film.com/products/properties_liquida.html
 
 
 
 
 
 
 On 17 December 2013
 14:24, Jon Wallace <jonw at psubs.org>
 wrote:
 
 
 
 
 I highly encourage you to modify it.  The one piece of
 the K600 that is obviously not useable is the VBT (identical
 to the K-350).  The plug suggested by Dan is a good
 option but with either an electric or hydraulic controlled
 valve you could modify the inflow/outflow from the middle of
 the end-cap to the bottom of the tank.  I also wonder
 if instead of an FRP tank you could modify an AL-80 or
 AL-100 scuba tank to perform the same function.
  Unfortunately they are not large volume and would not
 produce a lot of buoyancy.
 
 
 
 
 Jon 
 
 
 
 
 
 
 
 
 
 On 12/17/2013 1:10 AM, Bob Travis wrote:
 
 
 I'm
 about ready to assemble my VBT and have noticed that there
 will be about an inch of water left inside after it has been
 fully blown.  I looked through the archives and
 can't find any discussion about water remaining in the
 tank. Is this a bad thing?  All the photos of all the
 other K-350's that I've looked at don't have any
 way of draining the last bit of water out of the tank. Can
 anyone give me some advise here?  I don't like the
 idea of water remaining in it long term.
 
 
 
 
 Any advise would be greatly appreciated.
 
 
 
 Thanks!
 
 
 
 Bob
 
 Sent from my iPhone
 
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