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RE: [PSUBS-MAILIST] Nautilus pictures/large subs
Ian,
As a K-250 owner, let me be the first to say nothing is more fascinating to me than watching the big boats come to life. Personally I can't see how I could fit one of the big fish into my life, for practical reasons such as not living near the sea. But I wish I could. The best I can do is vicariously enjoy the progress of those builders who have the possibility of building real subs. A concrete sub is particularly interesting given the novelty. Please, do let us know how your project is coming along!
Thanks,
Alec
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From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of irox
Sent: Saturday, August 23, 2008 18:25
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.
>
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