[PSUBS-MAILIST] First Launch

Wed Oct 23 14:13:05 EDT 2013

I haven’t attached my pods yet to the pressure hull and after hearing about the aft positive buoyancy issue from a number of K-350 owner/builders I am now contemplating moving my pods aft one frame. I have all ready installed my drop weight threw hulls so I would have to extend the cross bar forward that goes between the pods for that plus not having any engineering experience, it would purely be a guess on what it would do to the trim. I doubt it would have the reverse effect and transfer the buoyancy problem to the front but not sure. 
One thought I had was to bolt them on per plans but be able to adjust them aft as needed to attain the proper trim and then when I find the magic spot, weld in the bell reducers I have and connect the power cables. Any thoughts out their pro or con?

Rick

From: James Frankland 
Sent: Wednesday, October 23, 2013 2:17 AM
To: Personal Submersibles General Discussion 
Subject: Re: [PSUBS-MAILIST] First Launch

What im going to do is fix 100Kg under the aft tank, and then make the rest in blocks that can be moved around.  Then divers can place them with straps to the underside somewhere until its balanced.  Will make the blocks at the weekend. 

On 22 October 2013 20:41, <MerlinSub at t-online.de> wrote:

  Hi James congratulations, 
  - seems more and more that to light is a normal standard on launching Psubs.

  May do not install fix weight in the stern next time. Install 
  it lose in the center and than trim it longitudinal on dive station
  with move it forward or aftward or more in or out. 
  Its the fastest way to figure out the right weight and trim. 

  By the way Alan our overalls are red, and it help the skipper 
  to figure out which guy is in his crew and which not..
  Also the guys with the brighter (many times washed out) overalls are the workers in the crew.. 
  http://www.hansesail.com/uploads/tx_gorillary/2013_38_euronauttauchtauf_01.jpg

  :-) vbr Carsten 

  "Alan" <alanlindsayjames at yahoo.com> schrieb: 
    Congratulations James,
    Look forward to the coming videos. 
    What a pain having to cut things short after all that effort.
    Maybe you cold buy everyone a set of orange overalls like Carsten
    does, to make things look professional.
    Alan

    Sent from my iPad

    On 22/10/2013, at 10:06 PM, James Frankland <jamesf at guernseysubmarine.com> wrote:

      Hi All,

      I got my boat in the water at the weekend for the first time.  Put the pictures up here.

      http://www.guernseysubmarine.com/operations.htm

      I didnt get any leaks at all, so i was super happy.  I wasnt really expecting to try and dive and would have been happy with just no leaks and a float test, but everything worked fine, so i gave it a go.  Unfortunately i didnt have enough lead.  I added 90KG (198lb) of lead, but it still wouldnt go down.  What i didnt mention on the website was that i was forced to stop testing because the harbour master came along to say that they had had an anonymous phone call from some bloody do-gooder who pointed out that we were using the comercial area of the harbour and didnt have a proper comercial dive team, which is officially a legal requirement.  So even though i had full permission from the harbour, i was forced to stop on a technicality.  They think it was some missery that has the hump on with harbour and just wanted to be awkward.  Shame because I was about to load a pile of anchor chain into the boat to get me more weight.

      The boat did seem to be very light at the back and i kept squirting air into the forward tank to level it out.  Thinking about it, i suspect that the forward tank was settling into the correct position and it was the aft tank that was riding high.  Just need to get some weight at the back.  I had a slight list to port as well which i've no idea where that came from.  Again i will trim that up.

      Anyway, i was really pleased with how it went on my first day.  Im meeting my divers tonight who took a load of underwater pics apparently, so i will see how they look later.  Might put some on the web if they are any good.

      Kind Regards
      James

      _______________________________________________
      Personal_Submersibles mailing list
      Personal_Submersibles at psubs.org
      http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

  -- 

  Carsten Standfuß
  Dipl.Ing.Schiffbau @ Meerestechnik
  Heinrich Reck Str.12A
  18211 Admannshagen

  0172 8464 420
  WWW.Euronaut.org
  Carsten at euronaut.org

  _______________________________________________
  Personal_Submersibles mailing list
  Personal_Submersibles at psubs.org
  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

--------------------------------------------------------------------------------
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20131023/901369f2/attachment.html>