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Re: [PSUBS-MAILIST] Pressure Hull Support Ring Types
Smells better and doesn't screw up the environment when you have leak.
Ian.
On Thu, 11 Jan 2007 09:56:40 -0800
"Brian Cox" <ojaivalleybeefarm@dslextreme.com> wrote:
> Why would you use Bio-Diesel???
> ----- Original Message -----
> From: Brent Hartwig
> To: personal_submersibles@psubs.org
> Sent: Tuesday, January 09, 2007 21:26
> Subject: RE: [PSUBS-MAILIST] Pressure Hull Support Ring Types
>
>
>
> Hello Steve
>
> Thanks for the data to chew on. If it is as you say easier to get
> crush depth data on a T-beam style you could use that same data do see
> what the same size I-beam would be is it was just a T-beam knowing that
> your structure would be at least that stronge and likely allot stronger
> which would give you a extra safety factor.
>
> I've been working on a design for a live aboard 80' sea worthy
> trimaran submarine for a few years now. It would be a bio-diesel,
> electric sub using Zebra batteries if I can get them. I'd also like the
> sub to also be pulled by a very large sail kite system.
>
> http://www.gizmag.com/go/3692/
>
> The main center pressure hull can detach from the sponson's and
> spar's structures that will then be a catamaran. The whole vessel can
> submerge as one unit to get out of storms or just explore. If the sub
> ever got flipped over it could submerge and right it self. I was also
> thinking about having the conning tower be detachable from the main sub
> and be a mini sub that could be used to escape the main sub in an
> emergency.
>
> I plan on building two smaller subs before I build the live aboard
> monster. I'm working on a design for a 20' Trimaran Sub that is diesel,
> electric and is in the general shape of a canard air craft, so it can be
> more or less flown underwater with additional flaps for slowing down as
> well as for fast turning. The sponson's would be soft ballast tanks and
> the spars can be hydraulically folded back along the sides of the main
> hull so I can keep the width down to 8' for trailering purposes. The
> sponsons would also rotate to aline themselves parallel with the sides
> of the main hull.
>
> On the top side I'm going to do something a bit different then I've
> ever seen on a sub before. I'll have what looks like the top of a
> Murceilago Lamborghini car with butterfly doors which is a free flooding
> space when you dive. In this space you'll be able to drive the sub while
> it's on the surface with-out the elements getting to you. This area will
> be partly built from a fiberglass kit car kit. This same basic design
> once proven in the smaller sub will be adapted to be used on the larger
> 80' sub as part of the catamaran structure so it can be driven as a
> separate craft from the main center hull.
>
> There will be a freshwater sprayer system inside this free flooding
> topside driving area that can rinse the interior after a dive is
> completed in saltwater or other dirty water dive sites to keep the
> windows and such clean. I'd also like to add hydraulically collapsible
> hydrofoils for faster and smoother surface running. Perhaps I'll make
> this sub have a wave piercing hull. There is a trimaran boat called
> Earthrace that is pretty amazing.
>
> http://www.earthrace.net/view.asp
>
>
>
> Brent Hartwig
>
>
>
>
>
>
> ------------------------------------------------------------------------
> ----
> From: "Stephen Pearce" <sjpearceqld@bigpond.com>
> To: <brenthartwig@hotmail.com>
> Subject: RE: [PSUBS-MAILIST] Pressure Hull Support Ring Types
> Date: Tue, 9 Jan 2007 11:59:00 +1000
>
>
> OFF - LIST
>
>
>
> Brent
>
>
>
> After following your recent posts it seems that you are enthused by
> the idea of building a bigger sub that a K 250/350. I am in the process
> of designing a larger sub my self and would love to know what you have
> on the drawing board.
>
>
>
> You will find that only a small percentage of the list members have
> an interest in larger vessels but the experience and qualifications held
> by some members of the group have been an incredible resource.
>
>
>
> Just a note on T stiffeners, by understanding is that in order to
> safely predict the hull crush depth you must know which mode of failure
> will affect the pressure hull first. If you go down the path of using
> rolled I beams you will have the added cost of getting an Engineer to
> assess this type of stiffener. I you use T stiffeners the work has
> already been done by ABS. The attached spreadsheet created by Dr C Redus
> is what I have used to workout my pressure hull specifications and (SWD)
> safe working depth.
>
>
>
> I have attached a picture of one of my earlier T stiffener and
> Bulkhead setups using ABS guidelines.
>
>
>
> Regards
>
>
>
> Steve Pearce
>
>
>
>
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