[PSUBS-MAILIST] New Join

Wed May 17 18:12:43 EDT 2023

Hey Greg,

It would be really interesting to your ambient sub hull and what your plans
were then and are now. We all like to hear about everyone's projects,
regardless of how technical they may be at the time.

Ambient is my preference, wet, dry, or semi-dry. Hence my interest.

Tim

On Wed, May 17, 2023 at 2:51 PM Gregory Snyder via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi Cliff!
> Excellent summary of the organization, but you forgot one category, the
> category that I fall into: the serious “Wannabe”.
>
> I purchased an ambient sub hull off of eBay and figured it would take me
> six months to get it in the water. Then we had a baby.
>
> As I figure, it will still take six months to get it in the water, but
> that baby is now 22 years old. I have moved that hull more times than I can
> count but I vowed to get it in the water someday!
>
> In the meantime, I have been very fortunate to be associated with this
> fine group of people who are incredibly smart, motivated and all-around
> awesome. I have enjoyed immensely being able to watch the progress of our
> members as they build honest to God masterpieces!
> Carsten ( our German entrepreneur ) built a submarine that is nicer than
> my house!!!
>
> Brian Cox ( RIP) did incredible work with cement.
>
> The list goes on and on.
> We are fortunate to have some of the WORLD’S best experts in our midst.
> Everyone is supportive and encouraging.
>
> I don’t actually know anything myself, so I don’t have much to offer in
> the way of technical advice or build advice or anything else like that. But
> if you need information on how to move a sub Hull from one place to
> another, I’m your guy!  I’ve got almost 22 years of experience!
>
> Now if you can just check back in six months  ….
>
> Welcome aboard!
> Best personal regards,
> Greg
>
> On May 17, 2023, at 12:22 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi John, I am far from being an engineer, so I rely on the help from a
> few members here to help with math etc.  You can do this, but first
> identify where you want to dive and how deep the boat ramps are.  Launching
> and retrieving a Psub  is often overlooked as an important design element.
> How far do need to tow the sub to you dive spot.  I would suggest you post
> more details with a design concept.   Let everyone comment on how to
> proceed and we can save you a lot of grief.   A lot of us have learned
> things the hard and expensive way.
> Hank
>
> Sent from my iPhone
>
> On May 17, 2023, at 8:09 AM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> 
> Welcome aboard John.  Always good to have a new Psub enthusiast.
>
> I agree with my friend Alec's comments and suggestions on how to move
> forward with your Psub.  Having designed and built and R300 and now having
> designed the R400 and having her under construction, I can offer a few
> additional suggestions.
>
> 1) You need to come to one of our PSub events and dive in the one of our
> boats before you commit to a design path.  My suggestion would be to dive
> in my R300 and in Alec's Shackleton and Dave Columbo's VAST K-250.  This
> would give you a feel for the range of boat designs.
>
> 2) Regardless of whether you design your own boat or work from plans to
> build a boat or acquire a boat and customize, you need to become master of
> sub design concepts and calculations such as surface and submerged
> displacement, purpose of Main Ballast Tanks (MBT) and Variable Ballast
> Tanks (VBT) or floats and the split between center of gravity and center of
> buoyancy CG-CB at different states such as transitioning between fully blow
> MBT and fully flooded MBT.  The sub design philosophy has a lot to do with
> CG-CB, i.e., flyer design vs. stable observation platform design.  As you
> note, reading and digesting Busby is a great starting point. I would also
> recommend "Concepts in Submarine Design" by Roy Burcher and Louis Rydill as
> well as "Fundamentals of Construction and Stability of Naval Ships" by
> Thomas Gillmer, chapters 7, 8 and 9.
>
> 3) Reach out to Dave Columbo. Dave is an architect by training and has two
> boats as his psub hobby, the first is a two-person flyer that he has
> designed and has under construction and a more recent acquisition, a
> K-250.  He lives in California.  It would be worth your time to go by his
> place and spend some time talking Psubs.  If you are up for a trip to
> Texas, I can put you up for the night and we can talk psubs.
>
> 4) You also need some face-to-face time with Jon Wallace as well.  Jon as
> founder of Psubs and is a walking encyclopedia of psubs  He currently has a
> K-600 refurbishment project underway.
>
> 5) My experience is that Psubbers generally fall into one of two
> categories.  The first are those that enjoy the design-build journey and
> oh, by the way, have a nice toy at the end of the project and those that
> want to explore the deep and need a psub for which the build is just a
> means to an end.  You need to self-critique yourself to see which of these
> two categories you fall.  This will impact on your psub direction.
>
> Good luck on your journey.
>
> Best
>
> Cliff
>
>
> On Tuesday, May 16, 2023 at 11:12:10 PM CDT, John Bussard via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hi all,
>
> Saying hi and introducing myself as a new poster on the list here.  I live
> in CA, have zero engineering background, but have gotten hooked looking at
> all of these projects.  I don’t have the time or space to start a project
> in the next couple years, which gives me some time to figure out if I can
> develop the skills to make a go of this, as I’m not much of a project guy
> at the moment.
>
> In thinking about how to proceed, I wanted to gain an understanding of how
> folks go about their respective designs: I’d like to come up with something
> “of my own” but understand that to have some calculation/measurement skills
> that are foreign to me.  Is it enough to do some focused reading in Busby
> to get the ball rolling?  Criteria I think I’m interested in
> 1) Multi-person (realistically that means 2 I think…)
> 2) Less interested in depth as opposed to ability to (if possible) be
> maneuverable, some endurance.  I’m most caught by the R300 as a concept, to
> frame the discussion.
>
> Those are my thoughts, if there’s anyone near San Diego who has time to
> talk about their project I’d love to meet y’all, either way I look forward
> to talking with folks here.
>
> In closing, the first message that came through for me was regarding the
> death of Phil Nuytten: Sad to learn of it and my thoughts are with friends
> and family here and throughout- I know what it’s like to lose special group
> members, and it’s never easy.
>
> Thanks to all,
> John Bussard
> San Diego, CA
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