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Greetings Submadman Captain Madsen, It's good see your sub getting wet under the ears. You've set a bench mark for PSUBers. I guess I better start building so we can meet in Tahiti. ;)' Or you can just come to Seattle, and we can attach my K-250 to your deck and go on some wild adventures. So build bigger, check. "Being spectacularly right is, after all, a pretty powerful argument in favor of your position." ~J. D. Baldwin "The breadth and depth of a man's mind is in direct proportion to the extent of his curiosity." ~Samuel Johnson Cheers, Brent Hartwig From: uc3nautilus@hotmail.com To: personal_submersibles@psubs.org Subject: [PSUBS-MAILIST] Nautilus pictures Date: Fri, 22 Aug 2008 10:15:13 +0200 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. |