[PSUBS-MAILIST] Dive fail.

Sat Jul 11 10:51:29 EDT 2015

Thanks Hank looks like saddle tanks the way to go,towing might be an issue
though.
Glen

On Sat, Jul 11, 2015 at 2:35 PM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

>
> Glen,
> After converting to saddle tanks, I would never go back.  The stability is
> remarkable, and in my case very robust.  I used 100 lb propane tanks
> because I had them but also they are super tough and pretty light.  As for
> towing, I can not comment, but I can say that my top speed seems about the
> same.  More effort could have gone into mounting the tanks to be more
> streamlined, but I am very happy with the performance.  You can see them
> real well on my launch video.
> Hank --------------------------------------------
> On Sat, 7/11/15, glen brown via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>  Subject: Re: [PSUBS-MAILIST] Dive fail.
>  To: "Personal Submersibles General Discussion" <
> personal_submersibles at psubs.org>
>  Received: Saturday, July 11, 2015, 6:39 AM
>
>  Hi
>  JamesSaddle tanks sound good ,but i have wondered how
>  much they will effect  towing . Thinking as a option of an
>  removeable fibreglass skin say 300mm from pressure hull
>  forming some kind of
>  deck.?regardsGlen
>  On Wed, Jul 8, 2015 at
>  12:54 PM, James Frankland via Personal_Submersibles <
> personal_submersibles at psubs.org>
>  wrote:
>  Hi Glen, If I were
>  doing it again, I wouldn't bother with the standard MBTs
>  at all.  I would make saddle tanks like on the
>  "Nemo" sub.  For better surface stability and
>  enclosed, so you don't burp air.    Im going to
>  change my boat over the winter to have tanks like that
>  instead, or probably as well.  Hank has done the same on
>  his Gamma. Im not sure what you mean
>  with the poly carb sheet attached to the top of the fore
>  mbt?  Is this for a deck of some sort?
>   I paid a boatbuilding company to
>  make the fibreglass tanks for my boat.  They made the plug
>  out of a load of blue builders foam sheets stuck together
>  and shaped that.  Then made the mould from that and layed
>  the glass into it.  The same as Dan H did I
>  think. regardsJames
>  On 8 July 2015 at 11:37,
>  glen brown via Personal_Submersibles <personal_submersibles at psubs.org>
>  wrote:
>  Hi JamesI am busy with my k350 mbts at the
>  moment trying to copy Dan's plug, mould, product. I was
>  thinking of using a section of poly carb sheet attached to
>  the top of my fore mbt.Any
>  comments?
>  Thanks
>  Glen
>  On Mon, Jul 6,
>  2015 at 11:04 AM, James Frankland via Personal_Submersibles
>  <personal_submersibles at psubs.org>
>  wrote:
>  Hi All,
>  I had a failure of a day on Sat.  I put the boat in, and
>  it had a
>  leak.  Not into the pressure hull, so it wasn’t a
>  complete failure, but
>  the leak was from the forward main tank.  The nearly
>  useless windows that I put on the forward tank were leaking
>  air.  Not just a little bit which I could have put up with
>  it, but loads.  The boat was diving quicker than venting
>  normally.
>   I pulled it out
>  and went around tightening them up.  Put it back in and it
>  didn't make any difference. It was strange as
>  they have been perfectly ok before.  I think the problem is
>  that on Friday while I was prepping the boat for diving, I
>  went around and tightened the bolts.  It must have broken
>  the seals.   Anyway.
>  I could
>  have possibly winged it by running with a reduced main
>  ballast, but as
>  I was heading into the open sea, I thought I best be
>  sensible and call it off.
>
>
>
>  So
>  It was in for about 10 minutes.  Pulled it out and was home
>  by 8:30, very
>  disappointed. Spent the
>  afternoon sticking them in with Sikaflex and
>  moaning. Hope these pics
>  make it through.  You can just see the air spilling from
>  the widows in the second picture and the boat is going down
>  nose first. Kind
>  RegardsJames
>  
>  
>
>
>
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