RE: [PSUBS-MAILIST] Nautilus pictures/large subs

[irox <irox@ix.netcom.com>]

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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