[PSUBS-MAILIST] SeaQuestor progress

[David Colombo via Personal_Submersibles]

Alan, that's a good point. Nothing wrong with multiple vents
David

On Thu, Jan 17, 2019, 2:02 PM hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alan,
> Good points, I almost made that mistake on E3000.  I ended up with
> individual pneumatic valves on each tank.
> Hank
>
> On Thursday, January 17, 2019, 2:40:45 PM MST, Alan via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> David,
> some food for thought on the ballast valve issue.
> GL requires that you be able to still get out if one of the ballast tanks
> is damaged.
> If your left ballast tank was hit high by your support boat etc & ruptured
> &
> if you had left & right ballast tanks vented from a single vent, then the
> right
> would also leak air out the left ballast tank rupture.
> I am making solenoid operated ballast valves that are linked to software &
> will level automatically.
> Alan
>
> On 18/01/2019, at 9:38 AM, David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi Cliff, I plan on doing a manifold system that groups together a couple
> of tanks for both port and starboard tanks and foward and aft tanks. I hope
> to use electric valves. The varible ballast is a worm drive 100# weight
> internal under my battery area. The external mbt will all be molded
> fiberglass shapped around the ribs between the pressure hull and
> exoskeleton, with the exoskeleton being one side of the tanks. I also plan
> on a lifting bag component at the nose area forward of the front pilot to
> be used to lift that pilot higher out of the water to increase the
> freeboard height of the ct for on station personal transfers.  Question, if
> i have a starboard and port tank, would you manifold them to a single valve
> locatation at the 12 oclock position, or use two valves to control each
> side.
>
> David
>
> On Thu, Jan 17, 2019, 11:14 AM Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Nice to see progress on your boat.  I love the pics.  On your segmented
> wrap around MBT, how are you going to vent the individual MBT segments?
> Are you going to use pneumatic actuated vent valves like Alec has on
> Shackleton or are you going to try and manifold the vent piping and have
> single MBT vent valves on the port and starboard side?
>
> Back to Hank's question, are you going to have a VBT or are you going to
> handle variable ballast like I do by adding ballast weights at the CG of
> the boat?
>
> What are you going to make the MBT segments out of, plastic like polyethylene,
> polypropylene or layup FRP?
>
> Cliff
>
>
>
> On Thursday, January 17, 2019, 8:59:28 AM CST, David Colombo via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi Hank, we have a trim weight inside using a worm gear drive, and the
> main ballast tank is a series of wrap around tanks between the hull and
> exoskeleton.
> David
>
> On Thu, Jan 17, 2019, 5:34 AM hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> David,
> Will you have a VBT?  Is the fibre glass shell acting as the MBT or will
> you have tanks?
> Hank
>
> On Thursday, January 17, 2019, 4:46:14 AM MST, hank pronk via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> David,
> Looking sweet
> Hank
>
> On Wednesday, January 16, 2019, 8:59:28 PM MST, David Colombo via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi guys, started to build the work platform for the building of the
> SeaQuestor exoskeleton. I couldnt resist setting the stations to get a look.
> David
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