Re: [PSUBS-MAILIST] "Split hull" question.

[Ray Keefer <psubs2001@yahoo.com>]

Hi NP,

I believe Kittredge build a K-350(?) some time ago
with a diesel engine for some guy up in Alaska. The
back of the hull was bolted together to allow access
to the engine. 

That would be the only place I would ever bolt a hull
together. Each half would have its own ring that is
machined flat with one containing a O-ring in grove.
Around the rings would be holes for the bolts.

Having the bolts outside would make bolting easier
then in a cramped interior. However out bolting would
require the rings to stick up and increase water
resistance. Probably not a big deal at the speeds a
K-boat travels at.

The rings act like reinforment ribs. The seam between
the rings resists water pressure. While the seals keep
water out until the pressure differential squeezes the
two halves together for a tight metal-on-metal fit.

Having a seam that goes laterally can be done. However
its shape would not be circular. As such it would act
as an unusually shaped reinforment ring with unknown
prperties and mathematics. As typical when someone
wants to deviate from the norm. Make a sample ( a few?
) and test them to see where they break. The derate
your intended sphere of operations.

Regards,
Ray

--- Nomdae Plume <nomdae@hotmail.com> wrote:

> Gentlemen:
> 
> I don't know if this topic has been previously
> discussed, as the archive 
> search feature on PSUBS isn't working.  Please
> pardon if this is an old 
> topic.
> 
> I was wondering if anyone has built a pressure-hull
> in sections that are 
> bolted together.  I've seen several large-scale subs
> that have used this 
> approach, and was wondering if it also works on the
> PSUB-sized boats.
> 
> My other question regarding sectioned hulls is: Has
> anyone seen a 
> multi-section hull where the seam was lateral?
> (Think of two bathtubs bolted 
> together, one atop the other.)
> 
> My interrest in this is that I'm considering how to
> build a small hull and 
> want to be able to easily maintain the inner
> workings.
> 
> Thanks,
> NP
> 
> 
> 
> 
> 
>
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