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Steve, I see you made your first press release of the your Loggerhead submarine. It's a mean looking boat to be sure. I'd put it in a medium psub class with Kraka. I think it will serve you well to built that boat before your Platypus live aboard submarine. I at one time had planned to build my live aboard submarine right out of the gate. But I know now that would of not been a good plan for me. Have you found a local supplier for your pressure hull heads? Cheers, Brent Hartwig Date: Sat, 23 Aug 2008 17:42:53 -0700 From: cliffordredus@sbcglobal.net Subject: Re: [PSUBS-MAILIST] Nautilus pictures/large subs To: personal_submersibles@psubs.org Stephen,
Very nice looking rendering of your boat! If this is a small boat, the big one must have been a monster!
Can you give us some specifics on Loggerhead such as length and beam, design depth, surfaced and submerged displacement, crew, range ...etc. We will be watching the progress of this boat with a lot of interest.
Cliff
----- Original Message ---- From: Stephen Pearce <sjpearceqld@bigpond.com> To: personal_submersibles@psubs.org Sent: Saturday, August 23, 2008 6:12:46 PM Subject: RE: [PSUBS-MAILIST] Nautilus pictures/large subs Ian Yes Ian, p-subs in some ways has become the cult of the K250 although I can see why when they are a proven design easily fabricated with plans readily available but it should be remembered that the subs that seam to most excite this list are often non K boats like this year's award winner the R300. Unfortunately the big one is on hold for at lest five years. With out going into unnecessary detail sub-prime and a failed property development mean I cannot fund that project at this point in time. I am now working on designing a smaller sub that can be built in the near future but still retains some of the capabilities you would associate with a larger p-sub. I have attached a .bmp rendering of the smaller design which I hope will be small enough to make it through the server. I will send you some 3D images of the big one off line. Regards Steve Pearce -----Original Message----- From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of irox Sent: Sunday, 24 August 2008 8:25 AM To: personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] Nautilus pictures/large subs This is great vessel. Many thanks to Peter for sharing his findings, experiences, pictures and videos. Peter, the information you just shared is *very* valuable to me - thanks! Hopefully, I can buy you a drink sometime. ;) As for the mute response, I've observed a fairly negative reaction to the discussion for large home made submarines on the list. At some point somebody seems to have defined a psubs as only having one or two occupants and can be towed behind a pickup truck, anything else is not acceptable. This is certainly why I'm hesitant to discuss large subs on this list. Sometimes I think maybe we should start another list where it's ok to discuss large submarine issues. But I see psubs is quietly changing, and new generation of psubs is being built and launched, most of them can house the annual psubs convention. Stephen, you are also building a large sub? I'd love to hear about it. Cheers! Ian. -----Original Message----- >From: Stephen Pearce <sjpearceqld@bigpond.com> >Sent: Aug 23, 2008 5:48 PM >To: personal_submersibles@psubs.org >Subject: RE: [PSUBS-MAILIST] Nautilus pictures > >Peter > > > >My sincere congratulations for what a magnificent achievement! > > > >Although the response from the mailing list has been surprisingly mute >please keep us up dated as there are many here I know admire both the UC3 >and Euronaut and the technical achievement that these boats represent. > > > >Warm regards > > > >Steve Pearce > > > > _____ > >From: owner-personal_submersibles@psubs.org >[mailto:owner-personal_submersibles@psubs.org] On Behalf Of UC3 NAUTILUS >Sent: Friday, 22 August 2008 6:15 PM >To: personal_submersibles@psubs.org >Subject: [PSUBS-MAILIST] Nautilus pictures > > > >Dear Psubbers, > > >As it has turned out - of the many projects for big 'live on board' >submarines UC3 Nautilus is the first to put to sea. Being first - means >that we are going to have all the trubble - and having no other psubbers to >ask... > >The boat is displacing 37 ton, and is 17.76 meters long. Her beam is 2.0 >meters, being also outside diameter of the pressure hull. This makes her the >smallest of the 'live on board' projects - CSSX Euronaut is 65 ton, and >Stephen Pearce´s Platypus is designed to be about 100 tons. However - those >magnificient vessels are not yet on water. > >Size, by the way, is not a goal to us. We have tryed to make the Nautilus as >small and simple as ever posible - but still large enough for us to walk >inside, thus allowing longer stays onboard >and allowing for longer journeys. > >During sea trails we have sailed 6.0 - 6.5 - knots max, loading our 3.8 >liter V3800 kubota main engine to about 60 % of full power. We use just less >than 10 liters of fuel pr. hour at 6.5 knots, and by 5 knots we use less >than 2 liters pr hour. With a capasity of 1200 liters inside, and 2700 >liters in outside seawater compensated tanks, we have quite extensive range >at service speed. That is exactly what the boat is designed to do - going to >other places in the world under her own power and diving there - in the >shallow to moderate depths of less than 100 meters. > >The boat can make dramatic sharp turns, with a turning radius of not more >than 1.5 times her own length. She also stops from flank speed in about 1.5 >times her own length... - including the time it takes to say "All stop - a >stern emergency !" in to the intercom and have the engineer execute these >orders in the engine room. > > The 1.1 meter five bladed propeller spins at 315 rpm when going at 6.5 >knots, and with its 0.96 pitch meter this makes the propeller slip 0.67, >compared to the assumed 0.65...the closer this number is to 1.0, the closer >the propeller is to run like in a thread - with a 0.96 meter pitch. > >We have a lot of work to do before we are fully operational - sensors, >submerged propulsion, diveplanes and more - but we are progressing steadily >- and I hope we are fully fit by the summer 2009. > >There is one thing I would like to share with you... > >I have had the pleasure to design three submarines since 2000. Freya at >three ton with e - motor only, Kraka at six ton with diesel - electric >propulsion and Nautilus at 37 ton. Frankly - the workload is far from >proportional with the size, in fact - Kraka was more work consuming than >Nautilus will ever be. And to take a crew of nine persons with you out to >sea, having seamen, engineers, navigators and other specialists on board at >one time - is just wonderfull. > >In short - don´t be afraid to make it BIG - it pays back out of proportion >to the work and costs that it takes to make these boats ! > >http://www.flickr.com/photos/25649704@N06/sets/72157604823470166/ > > >Best Regards, > > >Peter > > _____ > >Find din næste rejse på monondo. Læs mere her. > ************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. 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