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Topic: Kamewa Waterjets

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 [No title]   (Site not responding. Last check: 2007-10-21)
These waterjets are noted to be inefficient at low and mid- range speeds and they have speed and power operational limits imposed to reduce cavitation damage to their rotors.
The reason for this deficiency is that the standard waterjet is a pressurized water system with a pressure building nozzle positioned downstream of the rotor or impeller.
The improved marine propulsor of claim 23 wherein at least a portion of the liquid flow directing means that is in contact with liquid flow during at least a portion of its operation is curvilinear.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/56875.010809&ELEMENT_SET=DECL   (4633 words)

 Rolls-Royce: Marine   (Site not responding. Last check: 2007-10-21)
Kamewa waterjets have a very high pump efficiency.
At constant rpm, Kamewa waterjets absorb approximately the same power regardless of the ship’s speed.
Waterjets produce less vibration and noise than propellers.
www.rolls-royce.com /marine/product/propulsion/waterjets/default.jsp   (110 words)

 [No title]   (Site not responding. Last check: 2007-10-21)
These waterjets are noted to be inefficient at low and mid-range speeds and they have speed and power operational limits imposed to reduce cavitation damage to their rotors.
That is because the air layer under air cushion craft is ingested into the waterjet's inlet and causes a severe degradation of waterjet performance.
Waterjet air ingestion problems are also evident on many standard planing hull craft when operating in rough water where the waterjet inlet can be broached.
www.wipo.int /cgi-pct/guest/getbykey5?KEY=99/42361.990826&ELEMENT_SET=DECL   (4155 words)

 Kamewa Waterjets - TheBestLinks.com - Great Britain, Sweden, Volvo, Vickers, ...
Kamewa Waterjets - TheBestLinks.com - Great Britain, Sweden, Volvo, Vickers,...
Kamewa Waterjets, Great Britain, Sweden, Volvo, Vickers, 1999, 1986, Ireland...
The Kamewa waterjets are still traded by Rolls-Royce under that name and are offered in four versions,
www.thebestlinks.com /Kamewa_Waterjets.html   (155 words)

 Documento sin título
The vessel transports a maximum load of 760 tons (deadweight), which is equivalent to a displacement of 2110 tons.
It’s propulsion system is made up of four diesel engines Caterpillar 3600 of 7200 KW each and four KaMeWa waterjets, which provide a maximum speediness of 40 knots, and a cruising speed (90% capacity and 400 tons deadweight) of 33 knots.
The waterjets have a steering angle of 30º to each side and an inversion of 180º, allowing a very satisfactory manoeuvrability.
www.euroferrys.com /seccionesE/flota/pacifica/pacificadatos.php   (565 words)

 Rolls-Royce Waterjets Power US Navy's X-Craft
Mixed-flow type pumps used in Kamewa waterjets provide higher than 90 percent efficiency ratings.
Currently, over 180 Rolls-Royce Kamewa waterjets are used by the US Navy on vessels such as the MK V class and the eleven-meter Ridged Inflatable Boat (RIB), used extensively by the Special Operations Command (SOCOM).
Three different Kamewa waterjet families, providing power from 40kW to 50MW, manufactured in aluminum and stainless steel are available for a variety of applications.
www.prnewswire.com /cgi-bin/stories.pl?ACCT=104&STORY=/www/story/02-04-2005/0002950861&EDATE=   (609 words)

 The Manufacturer.com - Promoting best practices in manufacturing - - R-R to power experimental US Navy cat
Rolls-Royce has announced today that its Kamewa waterjets have been selected for X-Craft, an experimental high-speed aluminum catamaran.
Designed by United Kingdom-based Nigel Gee and Associates Ltd, the X-Craft will be built by Nichols Brothers Boat Builders, Whidbey Island, WA, for the US Navy’s Office of Naval Research, and will be evaluated for advanced hydrodynamic performance, structural behavior and propulsion systems efficiency of high-speed hull form technologies.
We are pleased to have the opportunity to showcase large waterjets to the US Navy,” said Patrick J. Marolda, President — Rolls-Royce Naval Marine Inc.
www.themanufacturer.com /uk/detail.html?contents_id=2741&PHPSESSID=35a468bc15e544934cd4e7e1f4a609d0   (197 words)

 Welcome to FASTcc - Designers of the Hydrofoil Assisted Catamarans - Hysucat / Hysuwac   (Site not responding. Last check: 2007-10-21)
Orginally twin KaMeWa A40 Waterjets were fitted and a top speed of about 40 knots was measured.
To improve thrust in the mid speed range (15 to 20 knots!) the Innovation was upgraded with twin KaMeWa FF550 waterjets.
The problem encountered earlier with surpassing the hump-resistance speed range was solved by use of the larger waterjets.
www.hydrofoildesign.com /?Page=PhotoGallery&SubPage=Inovation   (292 words)

 Society Maritime Industries : News
The present SII units are market leader in medium and large waterjets and are produced in stainless steel.
The first deliveries have been agreed with the shipyard Overmarine in Italy and comprise two steerable and reversible Kamewa waterjets size 63S3 to propel a fast yacht in Overmarine’s Mangusta 108 series.
Two MTU 4000-series engines each developing 2,400kW drive the Kamewa waterjets to give a speed of 37 knots.
www.maritimeindustries.org /news/view.jsp?ref=1032&start=   (483 words)

 SkyscraperCity Forums - #News: UAE Army, Airforce & Defence   (Site not responding. Last check: 2007-10-21)
The company said that three Kamewa waterjets on each Baynunah-class corvette will help create a top speed of more than 30 knots.
The waterjets, which will give the 67-metre ships unique maneuverability and shallow draft, are due to be delivered to the shipyard this autumn.
Kamewa waterjets are already in service with the UAE Navy on its 12 Ghannatha-class amphibious troop transports, which have a speed of more than 35 knots.
www.skyscrapercity.com /printthread.php?t=178887&pp=25   (2455 words)

 Maritime Global Net
It can achieve a range of up to 3,600 nautical miles, carrying 2,500 tonnes of cargo, at 36 knots, or carry 3,700 tonnes of cargo at 40 knots for 500 nautical miles.
The waterjets are already being designed and manufactured for commercial marine projects.
The main structure is high tensile steel, with only the accommodation and bridge decks to be constructed from aluminium alloy - maximising strength and combat-zone safety, minimising weight, and reducing build costs.
www.mglobal.com /news/newsreleasedetails.cfm?id=3761&type=   (542 words)

 Company profile Rolls-Royce Marine Benelux B.V.   (Site not responding. Last check: 2007-10-21)
Rolls-Royce Bergen diesels are trusted by customers world-wide and the reliable simplicity of Rauma Brattvaag winches has made them an industry standard.
Kamewa, Ulstein, Aquamaster and Bird Johnson have set the standard for propellers and thrusters since the 1930's, experience, which spawned the world-renowned Kamewa waterjets technology 40 years later.
Frydenbö and Tenfjord steering gear enjoy a unique position in the commercial market with more than 20,000 units delivered, and Brown Brothers and Intering motion control systems now incorporate the latest digital control technologies for optimum comfort and safety.
www.fme.nl /smartsite15424.htm   (261 words)

 [MHml] US Navy catamaran   (Site not responding. Last check: 2007-10-21)
Access to the main payload deck is via a large lift down from the flight deck or over folding ramps at the stern.
The structure of the vessel is all aluminium with propulsion by waterjets driven by gas turbines for high speed operation and diesel engines for lower speed loitering.
Rolls-Royce announced 27 March 2003 that its Kamewa waterjets have been selected for X-Craft, an experimental high-speed aluminum catamaran.
www.steamradio.com /pipermail/multihulls/2005-March/021172.html   (1233 words)

 New Millennium 140' - you've gotta see this! - Page 2 - YachtForums.Com
Generally the jets lose efficiency around 65-75 knots, probably due to lack of water through the intakes, and also that there hasn´t been a demand to develop waterjets for boats faster than that.
Without having the figures of Destriero right now, I think she was more expensive than that and she had a top speed somewhere just over 70 knots...
By the way, today I was at their harbour and saw a drag/skiboat passing with a turbine and I think it had waterjet.
www.yachtforums.com /forums/millennium-yacht/2351-new-millennium-140-youve-gotta-see-this-2.html#post7754   (1301 words)

 Defenceindia : Technology News : Rolls-Royce - Marine Propulsion Solutions
The naval marine business of Rolls-Royce brings together Rolls-Royce marine gas turbines, diesel engines and nuclear plant, with Bird-Johnson and Kamewa controllable and fixed pitch propellers, Kamewa water jets, Brown Brothers stabilisers and Michell Bearings propeller shaft and thrust bearings.
Rolls-Royce with its Bird-Johnson and Kamewa products, is the world leader in the design and manufacture of combat capable propulsion systems.
Water jets - For medium speed and high-speed patrol craft, Kamewa waterjets are the acknowledged technical leader and the natural choice for stealth, speed and manoeuvrability
www.defenceindia.com /26-jan-2k4/technology.html   (633 words)

 Warthog Territory Forums   (Site not responding. Last check: 2007-10-21)
Kamewa 125 SII waterjets for the US Navy's X-Craft, an experimental ship
waterjets and this project gives us the opportunity to showcase our skills to
Currently, over 180 Rolls-Royce Kamewa waterjets are used by the US Navy
forum.a-10.org /topic.asp?TOPIC_ID=8304   (2014 words)

 Cooper Bearings Application Bulletin Page   (Site not responding. Last check: 2007-10-21)
Waterjet drive shafts on 102-metre long vessel, using 4 MTU 20V 1163 TB73L 6500KW diesel engines and 4 KaMeWa waterjets.
The Corsaire 11000 is a light alloy, monohull ferry, reaching speeds up to 40 knots, ensuring fast passenger and vehicle transportation across international sea lanes within a maximum of 4 hours from place to refuge.
The unique sealing arrangement of the Cooper Split Roller Bearing gives greater protection to the rolling elements, making them the ideal solution for the high-seal specifications demanded by fast ferry builders and marine inspectorates.
www.kaydon.com /cooper/appbul/bull9.htm   (256 words)

 Ship Technology - Fast and Conventional Ferries Image Gallery
Propulsion is provided by four KaMeWa 900 waterjets.
MTU 16V 595 TE70L diesels, rated at 3,866kW at 1,750 rpm, driving Kamewa 90 SII waterjets via Reintjes VLJ 2230 gearboxes.
The Aremiti 5 is powered by four engines which drive a Kamewa 71 SII waterjet.
www.ship-technology.com /projects/fastandconventionalferries_gallery.html   (735 words)

 Yacht Moecca   (Site not responding. Last check: 2007-10-21)
This stunning, spacious and technologically advanced yacht has new owners and is currently privately cruising the Great Lakes and throughout the St. Lawrence Seaway.
"MOECCA" is an active foil assisted catamaran designed by Phil Curran at Oceanfast with the latest ride control and is powered by twin MTU/KaMeWa waterjets for stable high-speed performance.
The shallow draft makes for ideal lagoon and coral reef navigation in any part of the world with fast inter-island passage making.
yacht-vacations.com /charter/motoryachts/120-150/moecca/main.html   (147 words)

 Aerospacemedia   (Site not responding. Last check: 2007-10-21)
The ship, which will also feature Rolls-Royce Kamewa waterjets and shafts as well as Michell bearings, is being built for Lockheed Martin and will be delivered to the Navy in late 2006.
The ship will test Rolls-Royce patented AWJ-21™ waterjet technology over the next six months on Lake Pend Oreille at the Navy's Acoustic Research Department in Bayview, Idaho.
Rolls-Royce will deliver two steerable and reversible Kamewa waterjets size 63S3 to propel a fast superyacht in Overmarine’s Mangusta 108 series.
www.aerospacemedia.com /aerospace/pr_read.asp?id=1547   (1342 words)

 Navy League of the United States - Citizens in Support of the Sea Services
The company already is supplying new propeller technology to the U.S. Navy for its Whidbey Island (LSD 41) and Harper's Ferry (LSD 49) classes of amphibious ships; the R-R technology improves fuel efficiency by over 6 per cent, and saves on load-management and maintenance.
The AWJ-21, an innovative application of proven waterjet technology configured for underwater discharge, is under development in cooperation with the U.S. Navy's Office of Naval Research.
In its basic configuration it is equipped with two high-speed diesel engines and two waterjets.
www.navyleague.org /sea_power/jul_01_15.php   (2973 words)

 Ship Technology - Propulsion is provided by four KaMeWa 900 waterjets (two steerable jets and two booster jets).
Ship Technology - Propulsion is provided by four KaMeWa 900 waterjets (two steerable jets and two booster jets).
Propulsion is provided by four KaMeWa 900 waterjets (two steerable jets and two booster jets).
Copyright 2005 SPG Media Limited a subsidiary of SPG Media Group PLC
www.ship-technology.com /projects/ambulu/ambulu5.html   (45 words)

 X-Craft / Littoral Surface Craft-Experimental (LSC(X)) / FSF 1
Sea Fighter is powered by a combined diesel or gas turbine (CODOG) engine plant outfitted with two MTU 595 diesel engines and two General Electric LM2500 gas turbines.
Two well-proven MTU 16V 595 TE90 diesel engines and two GE LM2500 gas turbines are used in a COmbined Diesel Or Gas turbine (CODOG) configuration with a corresponding gearbox, propelling the X-Craft with four waterjets to speeds of more than 50 knots.
Under the contract, awarded by prime contractor The Titan Corporation, four high-efficiency Rolls-Royce Kamewa 125 SII waterjets will accommodate 50.4MW of power driving the vessel to speeds of up to 50 knots while offering greater maneuverability.
www.globalsecurity.org /military/systems/ship/x-craft.htm   (1850 words)

 Successful Ferry
In particular, its captains are pleased with the manoeuvring, handling and control of the new ship.
At steaming speeds, steering is normally carried out via Seastate’s Tmax system, which increases overall efficiency by allowing all the thrust from the ferry’s four Kamewa waterjets to be used for propulsion.
The steering functions of the waterjets are thus normally only used at low speeds, particularly when approaching or leaving berths.
www.marinetalk.com /articles_HTML/AUS001112711IN.html   (332 words)

 Welcome to FASTcc - Designers of the Hydrofoil Assisted Catamarans - Hysucat / Hysuwac   (Site not responding. Last check: 2007-10-21)
As Rescue Boat the RB-M12 was to be equipped with a propulsion system for shallow water operation and high speed rough water capabilities and speeds over 40 knots.
Twin Yanmar Diesel engines with 2 * 310 kw, 2F280 gears and twin KaMeWa waterjets were selected.
Performance calculations were conducted with the Hysucat mathematical model and with the KaMeWa power-thrust-speed characteristics a speed of 42 knots was predicted which was well achieved during trials.
www.hydrofoildesign.com /?Page=PhotoGallery&SubPage=RBM12   (335 words)

 Shipping, shipbuilding, offshore news
The aid can be additional to member state support.
The monohull EHSCV is powered by two Rolls-Royce MT30 gas turbines and Rolls-Royce Kamewa waterjets.
It is being offered as a cost-effective short-sea shipping alternative to road transport in Europe.
www.marinelog.com /DOCS/NEWSMMIIb/MMIISep26.html   (269 words)

 Juan Patrico   (Site not responding. Last check: 2007-10-21)
The vessel has acheived this by offering a top speed of 51 knots allowing it to cross from Buenos Aires to Montevideo in 2 hours and Buenos Aires to Colonia in 40 minutes.
Direct driving of waterjets is now well proven with all of Incats eleven previous car ferries incorporating a direct drive system.
The vessel has a capacity for 436 passengers consisting of seating for 96 first class passengers on tier 3 and 340 tourist class passengers on Tier 2.
www.home.aone.net.au /amd/news/juan/juan.html   (305 words)

 The design, construction and introduction of the Stena HSS 1500
The General Electric GE LM2500 turbines have been adapted for marine use and are encased in fire and sound proof containers.
Each of the craft's hulls contain two gas turbines which drive two KaMeWa waterjets via a MAAG reduction gearbox.
The bridge is in the furthest forward, topmost section of the vessel; navigation desk, engineers control station, position fixing and charts, and port interface are discussed.
www.imarest.org /publications/content/details.asp?ID=87   (293 words)

 Presse   (Site not responding. Last check: 2007-10-21)
Its propulsion is handled by the most modern engines in its class: four MTU 20V 8000 diesel engines.
They drive two controllable KaMeWa waterjets and one waterjet as a booster with a total output of 32,800 kW and accelerate the fully laden trimaran to a traveling speed of 40.5 knots.
MTU Friedrichshafen also supplied the five on-board generators, four of which have a 12V 2000 engine (540 kW), and the remaining one a series 60 engine (250 kW).
www.mtu-friedrichshafen.com /en/ps/ps_050603_1.htm   (453 words)

 Gladding-Hearn bustling with new business   (Site not responding. Last check: 2007-10-21)
The Seastreak New Jersey can carry up to 400 passengers (319 inside) on the 20-minute run from Highlands, N.J., to New York’s Wall Street, according to Peter Duclos, president of Gladding-Hearn, Somerset, Mass.
The catamaran has a speed of 39 knots when its four 1,875-hp Cummins Marine KTA50-MA diesels and four KaMeWa A50 waterjets are turned up.
Each hull houses a pair of engines, staggered one ahead of the other, and waterjets connected by Reintjes VLJ-730D gears.
www.workboat.com /archives/02mar/otw_2.htm   (419 words)

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