[PSUBS-MAILIST] SeaQuestor progress

Thu Jan 17 20:30:11 EST 2019

Hi Alec, Thanks. I am planing to have both forward and aft tanks on each
side, so you just saved me two valves. I like the idea to be able adjust
for and aft, since they are different shapes and volumes. I am also
planning to have the side tanks on the larger volume to be made up of 4
chambers that would prevent sloshing except in each 12" wide section.

Best Regards,
David Colombo

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

On Thu, Jan 17, 2019 at 4:10 PM Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Dave,
>
> Is it just one tank per side? If so you could valve them separately for
> redundancy but there is literally no situation where you’d need to control
> them independently to adjust lateral trim. If you have (or could have) two
> tanks per side, then it’s really useful to plumb them in forward and aft
> pairs.
>
> Best,
> Alec
>
> Sent from my iPhone
>
> On Jan 17, 2019, at 5:18 PM, David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> 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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