[PSUBS-MAILIST] Sub Launch at Harbor

[David Colombo via Personal_Submersibles]

Brian, good thing it was shallow there.  It would be quite a ride to
determine how long it would take to level off with that angle snd it was
deeper.
David

On Wed, Aug 26, 2020, 2:21 PM Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alan,  Underwater I was sitting at nearly a 45 degree angle, with the nose
> on the bottom and the sphere up.
>
> 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] Sub Launch at Harbor
> Date: Thu, 27 Aug 2020 08:44:53 +1200
>
> Congratulations Brian,
> how was the stability when you were under? Did you move up in to the
> conning
> tower & shake her around?
> You should have done a circle underwater.
> Alan
>
> On 27/08/2020, at 5:12 AM, Brian Cox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Cliff,   I think that would only delay the inevitable , I think I would
> still be at the same angle.
>
> Brian
>
>
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org>
> To: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Sub Launch at Harbor
> Date: Wed, 26 Aug 2020 16:44:48 +0000 (UTC)
>
> Congratulations on the successful surface maneuvering test and dive.  You
> might want to experiment with different orifice inserts in the forward MBT
> vent opening to see if you can reduce the pitching moment when flooding by
> reducing the flowrate of air out of this tank.  I use this technique on the
> R300 for the same purpose.
>
> Cliff
>
>
>
> On Wednesday, August 26, 2020, 11:27:53 AM CDT, Brian Cox via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Yeah, that's my super secret emergency dive procedure !
>
> 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] Sub Launch at Harbor
> Date: Wed, 26 Aug 2020 12:03:20 -0400
>
> Hey, that wasn't a launch, it was a dive!! Congrats! When the bow went
> down like that, did it rest on the bottom? That was a pretty radical angle,
> and the speed of it makes me think you had a massive free surface
> displacement in the MBT. Normally that induces lateral instability, but due
> to the length of your boat in this case it would be longitudinal
> instability.
>
> Thanks,
> Alec
>
> On Wed, Aug 26, 2020 at 10:44 AM Brian Cox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi All,
>                 Have a couple of videos from down at the harbor:
>
>
> https://www.youtube.com/watch?v=iERfLiioGJA&t=628s
>
>
>
> https://www.youtube.com/watch?v=OGiAqeocq4s
>
>
> Cheers,
>
> Brian
>
>
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