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Good advice Ian. Could you say how much trouble it
might be to put reinforcement hoops in the interior and could the bolt holes in
the viewports be welded shut and the viewport's lens's be attached
by
clamp or epoxy since the pressure would hold them
fast to the hull flange anyway once underwater? When I first saw the posting on
this sub I thought what an inexpensive way (if the bids dont go up) to get most
of what you would
need already built except for the internal bracing
hoops that I also noticed were missing.
Kindest regards,
Bill Akins.
----- Original Message -----
Sent: Monday, June 06, 2005 11:46
PM
Subject: Re: [PSUBS-MAILIST] Re: 1 (2?)
man "working" Disney(ish) Nautilus sub on ebay
Welcome, Jim.
The "K250/350 hybrid" was a submarine
that was for sale on ebay in
late 2004. It was close (rather
subjective) to my house so I took
a look to see if it was worth
buying. It was made from K250 plans,
but with lots of changes from
the builder (some bad), it also had
some K350 styling such as the conning
tower. The picture are on
the moki picture exchange under "2 person
k250".
Internal framing. Most pressure vessel have ribs along the
inside
(or outside) of the pressure vessel. These are very important
and
are the only reason the sub can dive deep without being crushed.
If
you look at this picture in the K250 hybrid I was talking about:
http://www.prismnet.com/~moki/20041127.134008/Kx50_hybrid5.jpg
You
seen "hoops" on the inside of the pressure-vessel spaced every
so
often. If you look at the picture of of the nautilus sub:
http://www.prismnet.com/~moki/20050605.153205/f9_3.JPG
There
are no "hooks" space every so often. There is a band on the
inside,
maybe it's for mounting equipment, but it won't provide
much re-enforcement
of the pressure vessel (even if there where
many of them). This is
big reason I would not dive in it. Maybe
it's safe to pop under the
water can come back up, but without
proper ribbing it will have a shallower
colapse depth. The
colapse depth can be calculated, but any out of
roundness in the
hull will reduce it further.
"little
bottles". I meant little bolts (sorry I was sleepy) as
in
nuts'n'bolts. They go all the way thru the view port housing
from the
inside to the outside. This means drilling holes in
the
viewports. As well as more holes in the sub...
I think the
peddle power is via a hand crank. Rather than foot
peddles. The
prop looks pretty, but my gut says that sub won't
go over 1knot under it's
own power.
"never been underwater yet" means you are buying a pile of
submarine
shaped scrap metal. You will be the one that makes it a
submarine,
by removing what is wrong, sanding the paint and inspecting all
the
welds, grinding out and re-welding where needed, fitting the
missing
components, adjusting things for short comings in the
design...
I don't mean to put you off, just give you an idea of what you
are
getting into. I would do it if I found the right sub.
I
like the two large side viewports. It looks like it might be
the same
as the forward big viewport. This is a change I that I've
often
thought would be nice on the K350, but the would have to be
bigger housing
inside the sub in order to support the ribs that it
would need to
disrupt.
Hope this helps,
Ian.
On Mon, 6 Jun 2005
14:59:27 -0700 (PDT)
Jim Pesanka <jpesanka@yahoo.com> wrote:
>
Hello everyone,
>
> My name is Jim and I have been a
member of Psubs for a while. I have a genuine interest in submarines and
especially the personal variety, though I have not actually built one
yet. I've enjoyed reading the messages I've found here, but this is the
first time I've had a reason to actually post one myself. I have a
question, but first allow me to express my congratulations to your new psub
owner, Pierre, on his recent success with the submersible "Big". I look
forward to seeing pictures of it.
>
> To my question: it
concerns the Nautilus sub on Ebay. It's not often a submarine comes up
for sale. There is some interest in buying this one, but many of us have
little understanding of what a sub like this should (or should not) be
like. We would appreciate the observations of those with more knowledge
than we possess.
>
> I found Ian and Mike's comments
informative. Thank you both.
>
> Ian,
Could you explain what a K250/350 hybrid is? And would you expand on the
lack of "internal framing" you mentioned? Also the "little bottles" at
the viewports, please? And especially your comment that you "wouldn't
dive in it": This leads me to think it might be unsafe. Obviously,
that's important to any of us thinking of buying this sub. Please give
us some reasons why you feel that way, if you will.
>
>
Mike, you made some enlightening observations as well. Please go into a
little greater depth on the subject, will you? (Oh my! I honestly
did not intend a pun there, but the deed is done.)
>
> Will
everyone here, please, take a look at the Ebay auction and the pictures of
this sub, and give us your thoughts and observations? Does this look
like a well designed and soundly built submarine we should feel safe in, or
not? And in either case, why?
>
> Other questions
include: "What is the importance of the seller's statement that this sub has
never been underwater yet?" and "What do you estimate a fair price for this
submarine to be?"
>
> I'm wondering about it being
"pedal powered". I assume that means it works like a bicycle, and would
like to know how efficient that would be in a sub of this size and weight,
especially with the propeller being of the unusual type shown? What
would you all estimate the top speed of such a vessel to be, if that's
possible to determine?
>
> With what can be known of the
submarine from available information, is it possible to determine how reliable
it might be underwater, and what depths it might successfully
attain?
>
> Any other comments and observations you'd care
to make will be appreciated, and could be very important to someone's safety,
so please don't hold back or worry about being "politically correct". If
you think this is a good sub, please say so and explain why. If not, we
need to know that, too.
>
> I'd also beg for this
topic to receive some priority from the group, as the auction will only be up
for a limited time. Your comments may be vitally important, and time is
of the essence. Thank you.
>
> Cheers!
>
> Jim
>
>
> Michael Holt <mholt@ohiohills.com> wrote:
>
Ian Roxborough wrote:
>
> > It reminds me a little of the
K250/350 hybird, but with no internal
> > framing. The same skinny
viewport housings. Maybe the builder had
> > seen a set of K250
plans. The inside picture has a shot of the
> > viewport housing,
with little bottles that appear to go all the way
> > thru the
housing! Looks pretty, I wouldn't dive in it.
>
> I'd kinda like
to talk with him. Does that address on ebay really
> work? I've had some
trouble with ebay addresses.
>
> Pedal-powered, he suggests. No
propulsion system is fitted, it
> seems. I bet it's planned to do
nothing more than dip a few feet
> under the surface.
>
>
In the background of one image, there's what looksl ike a small
>
replica of a steam locomotive. The sub may have been nothing
> more than
a welding project for him.
>
> Thanks, Ian.
>
>
> Mike
>
>
>
>
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