[PSUBS-MAILIST] Making a little headway

[james cottrell via Personal_Submersibles]

My son helped me remove the ballast tanks and decking from the sub today in preparation for a new paint job. It's nice to be renovating the sub after an 8 year hiatus. All new domes and other viewports have been fabricated. New coms and thrusters too. Looking forward to diving again late summer.
Greg      From: Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, June 16, 2017 12:32 PM
 Subject: Re: [PSUBS-MAILIST] Test at boat yard
   
I am sure you will get the kinks worked out.  Nice work so far Brian.
Jon
 

    On Thursday, June 15, 2017 10:45 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Hank,             My original intention was to use that forward tank as a trim tank and I also had a idea that I would change orientation and go vertical like the Scripps ship "Flip"  , which I pretty much almost did today!   But now I'm just concerned with having a working sub for the time being.  When I made the forward trim tank it needed to be able to take the same pressure of the hull but I think I over did it a bit and used too heavy a gauge pipe .   I'm not getting the buoyancy that I need ,   it was difficult to calculate what the weight of the ferro cement would be in water up in the front there.     I ran most all the air out of the MBT  and at the end the nose took a nose dive.  I think the best thing would be to put a big cylinder of synaptic foam in place of the tank I have now , that way I could add extra compressed air cylinders if there is too much buoyancy ,  or lead to find the balance point.     One thing that I'm extremely pleased about the freeboard when the MBT is filled with air,  I have nearly 4 ft  to the top of the hatch. Brian  
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