[PSUBS-MAILIST] Bladder MBT's

[hank pronk via Personal_Submersibles]

 David, your situation will be tricky because you can't see you lift bag inflating.  A pressure regulator could be the answer. Hank
    On Friday, May 8, 2020, 4:10:49 PM MDT, David Colombo via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hank, I am planning on using the lifting bag technology as the inner spacial area between the hull and exoskeleton. The rubber material is the same as used on a inflatable rib. The challenge is the configuration of the tube so as to not over inflate, change the shape, and warp the exoskeleton. While not to be used as main ballast tanks, but as additional lifting capability while on the surface to lift our front pilot higher to get closer to the ABS freeboard height requirements. At least that is the plan.
Best Regards,
David Colombo

804 College Ave
Santa Rosa, CA. 95404
(707) 536-1424
www.SeaQuestor.com



On Fri, May 8, 2020 at 1:24 PM Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

Hank, I presume that keeping minimum profile is a design criterion? My first thought was lightweight but rigid tubes that the bladder can expand into, but of course that doesn't save any space. What is the shape and dimensions of the inflated bladder?

Sean




-------- Original Message --------
On May 8, 2020, 05:51, hank pronk via Personal_Submersibles < personal_submersibles at psubs.org> wrote:

Hi All, I have ordered a 50 gallon water bladder to experiment with for MBT's on my little sub project.  The bladders are pretty tough because they are rated for 65 psi.  I have to figure out how to secure them to the sub.  I am thinking a fold away panel, or spring loaded straps.  They have a 1.25 inch fitting on the top and on the end when laying flat.  I need some ideas?  I will have two side bags and one behind the sphere.Hank_______________________________________________
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