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Re: [PSUBS-MAILIST] double endcaps sub, stability
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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> > > >
> > >
> >
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>
> > ATTACHMENT part 2 application/vnd.ms-excel
> name=Stablility1.xls
>
>
>
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