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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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>
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> ATTACHMENT part 2 application/vnd.ms-excel
name=Stablility1.xls
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