Re: [PSUBS-MAILIST] double endcaps sub, stability

[Warren Greenway <opensourcesub@yahoo.com>]

No, I'm afraid I didn't recieve the attachment. What
was it? By the way, I noticed the improved vertical
thruster positions. Very nice, I was concerned about
having a vertical thruster at the bow, for stability
reasons. I wonder how it will handle with the
thrusters
at an angle? If it works, the two thrusters would
allow
more freedom of movement, since you could "creep" from
side to side as you adjusted your depth.

Warren.

--- Thijs Struijs <thijs-struijs@planet.nl> wrote:
> Warren,
> 
> Thanks for the compliment. The idea of placing the
> batteries for and aft is
> a good one. I will have a look at it.
> By the way, did you receive the attachment?
> 
> Greatings,
> Thijs Struijs
> 
> ----- Original Message -----
> From: "Warren Greenway" <opensourcesub@yahoo.com>
> To: <personal_submersibles@psubs.org>
> Sent: Monday, October 27, 2003 5:16 PM
> Subject: Re: [PSUBS-MAILIST] double endcaps sub,
> stability
> 
> 
> > I am really falling in with this line of thought.
> I
> > can see now that the design is more flexible with
> the
> > batteries outside the hull. I am wondering,
> though, if
> > we shouldn't place the batteries fore and aft a
> little
> > lower on the pressure hull to improve stability. I
> was
> > originally thinking along side the hull, but I do
> > prefer your idea of keeping the hull thin and
> sleek.
> > (By the way, this has to be one of the nicest
> looking
> > subs I've seen!)
> >
> > Warren.
> >
> > --- Thijs Struijs <thijs-struijs@planet.nl> wrote:
> > > Warren,
> > >
> > > I have tried to place the batteries inside the
> > > pressurehull. I sat in my
> > > mock-up (a frame made out of plastic tubes) and
> > > tried to find a place for
> > > the batteries (carton boxes). I did not succeed.
> So
> > > now i want to place them
> > > behind the pressurehull. This has the advantage
> that
> > > the profile of the sub
> > > stays slim.  I want to use two 85 AH batteries
> for
> > > the Endura 30 Minn
> > > Kota's. There are 4 off them, 2 horizontal and 2
> > > vertical under a 45 dgr.
> > > angle.
> > >
> > > Placing the batteries behind the pressure hull
> made
> > > me worry about the
> > > stabiliy. But when you look at an avarage car
> > > battery, and you look at the
> > > volume (= buoyancy) compared to the weight they
> are
> > > not that heavy at all.
> > > Anyway i made some "calculations" which i will
> try
> > > to send as an attachment.
> > > About some things i had to make a guess but most
> > > figures are extracted from
> > > the 3D autocad drawing.
> > >
> > > I also send a drawing to moki files. You can see
> the
> > > battery box and the new
> > > thruster configuration. Between the batteries
> and
> > > the MBT there is room for
> > > the air bottle(s).
> > >
> > > Greatings,
> > >
> > > Thijs Struijs from
> > > The Netherlands
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Warren Greenway"
> <opensourcesub@yahoo.com>
> > > To: <personal_submersibles@psubs.org>
> > > Sent: Wednesday, October 22, 2003 5:42 PM
> > > Subject: Re: [PSUBS-MAILIST] DElta sub (was:
> > > kitredge sub)
> > >
> > >
> > > > Hey, Thjis. Have you figured out anything on
> the
> > > > battery arrangement for the OSS hull? I was
> > > starting
> > > > to wonder if it wouldn't be better to follow
> our
> > > > original line of though and place the
> batteries in
> > > > external "pods". The reason I was thinking
> this,
> > > was
> > > > I was considering a hatch at the bottom of the
> > > hull,
> > > > for submerged entry/exit and ambient running,
> if
> > > > ambient pressure was desired.
> > > >
> > > > Warren.
> > > >
> > > > --- Thijs Struijs <thijs-struijs@planet.nl>
> wrote:
> > > > > I suppose it about the Nekton Delta.
> > > > >
> > > > > Thijs Struijs
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Michael B Holt" <tlohm@juno.com>
> > > > > To: <personal_submersibles@psubs.org>
> > > > > Sent: Thursday, October 09, 2003 9:45 PM
> > > > > Subject: [PSUBS-MAILIST] DElta sub (was:
> > > kitredge
> > > > > sub)
> > > > >
> > > > >
> > > > > > On Thu, 9 Oct 2003 07:08:09 -0600 "Adam
> > > Lawrence"
> > > > > <adteleka@in-tch.com>
> > > > > > writes:
> > > > > > >The Delta is like the Kittredge subs in
> that
> > > it
> > > > > has added weight to make
> > > > > > it
> > > > > > >slightly negatively buoyant when all the
> air
> > > is
> > > > > out of the two ballast
> > > > > > >tanks, fore and aft.
> > > > > >
> > > > > > What's the Delta?   I don't recall it.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > Mike Holt
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
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