[PSUBS-MAILIST] submerge !

Thu May 9 19:47:18 EDT 2019

Hi Brian,
I was thinking that it might be a good idea on these type of tests to have
your comms  and VHF up and running so your in complete control of the
operator with the lift. Also for us watching, we could hear what was going
on inside the sub as well while your are manipulating the ballast controls.
Best Regards,
David Colombo

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

On Thu, May 9, 2019 at 4:20 PM Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alec,      The Sphere is the stern and the pointy part is the bow , on the
> surface anyway.   You can see in the video once I'm totally submerged there
> is still a far amount of air in the ballast.  When I blew the front tank (
> which you can't see because of the shell) it lowered the nose a bit and
> that transferred some additional air ( in the main ballast) back to my main
> ballast vent.  So the situation is, that if the nose is too high some air
> can get trapped in there that I cannot vent unless the attitude is
> changed.
>
> And thanks to everyone for your congrats !  I sure found it hard to sleep
> last night knowing this was finally going to happen !
>
> Brian
>
>
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] submerge !
> Date: Thu, 9 May 2019 19:00:57 -0400
>
> Hi Brian,
>
> That was a big step, congrats! I thought the video looked like you were
> not far off at all on buoyancy, because the straps appear quite loose. Good
> trim too! Also it seems there’s just oodles of volume in the MBTs. When you
> say you couldn’t get the bow to rise, d’you mean even blowing the forward
> MBT? Given it’s apparently generous volume, that would seem surprising.
>
> Thanks,
> Alec
>
> Sent from my iPhone
>
> On May 9, 2019, at 5:43 PM, Brian Cox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi Alan,
>                    That video with me rocking back and forth was with
> absolutely no lead ballast in the bottom, so it was very unstable at that
> point.
>
>  It's basically too heavy, so I can reduce the lead ballast somewhat, but
> if I take too much out it will be more unstable during the transition
> stage.  It was hard to get a good reading on what was happening because I
> couldn't tell if the front straps were supporting the front of the sub.  I
> think they were though, I did a test where I tried to bring the nose up by
> it self and I couldn't do it , so that tells me that the nose is still a
> bit heavy.    I think I want to get one of those fiberglass hp tanks that
> Hank was talking about.
>
> Brian
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] submerge !
> Date: Fri, 10 May 2019 09:29:53 +1200
>
> Brian,
> Congratulations!
> The sub is looking good with all your recent modifications.
> Did you test the stability at all? I know in a previous video you were in
> the
> Conning tower rocking her about. Would have liked to have seen a diver
> on the outside trying to pull her over as you went down.
> Looked like you could trim her well, were you happy with that?
> Alan
>
> On 10/05/2019, at 9:16 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Brian,
> You get first prize for classy test facility.  Congratulations!  you sure
> got some big ass vent valves
> Hank
>
> On Thursday, May 9, 2019, 2:32:55 PM MDT, Brian Cox via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi all,
>                      Finally went all the way under !    Need to adjust a
> few things.  Combination of less ballast weight overall and some additional
> buoyancy in the nose.
>
>
> https://www.youtube.com/watch?v=QlPXqX9Vmgo
>
>
>
> Brian
>
>
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