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	Key Publishing Ltd Aviation Forums - Pumpjet propulsor
		Pumpjet or not, the 688I has to be running at full power without lubrication oil, while being tied at the pier, to surpass the noise level of Seawolf at 20 kts
		I have the impression that one of the major problems of pumpjet is the clogging up by sand and mud while operating in shallow water or near shores.
		Pumpjets are also difficult to clean up and rust easily.
	forum.keypublishing.co.uk /showthread.php?t=47978 (1688 words)

	[No title] (Site not responding. Last check: 2007-09-10)
		A runner - stator pumpjet would provide sufficient use of engine powershaft using 304 stainless steel for the shaft materialB, the hub diameter, which includes shaft bearings and a cover, was found to be 1.7ower was determined to be 30 lb-A specific speed of 800 was assumed for the engine.
		The number of runner blades was set at ten, a reasonable number for a pumpjet of this size.
		In Figure 11, an inboard drawing of the pumpjet in a possible application is shown with approximate dimensions.
	sun-valley.stanford.edu /~hlj/projects/pumpjet.doc (1266 words)

	Key Publishing Ltd Aviation Forums - Pump jet propulsor?
		The concept is to fight faster than the enemy, similar to the supercruising concept of the ATF whereby soviet fighters could not be able to fight at the speeds ATF could and be robbed of the initiative since they could not engage or disengage at the time of their choosing.
		The disadvantage is weight from the shroud, cost of design which can be challenging and until recently with the British, erosion of the pumpjet shroud which is now composite on the new Astutes to reduce this and its associated maintenance cost.
		On the ducted tail rotor on the Eurocopter product line, the blades aren't axisymmetrically arranged- there is an unequal amount of space between some of the blades- it's balanced, but I was told by one of the company pilots that this was done to reduce cavitation and thereby reduce noise.
	forum.keypublishing.co.uk /printthread.php?t=52448 (1638 words)

	ISP Main
		This interaction calculation is combined with other components of a simple inviscid model of ducted propulsor performance: axisymmetric duct and hub boundary-element approximations coupled with a lifting-line representation of each blade row.
		Parameters of the overall model are selected to bring about correlation with the circumferential-mean pressure distribution on the duct and component loads acting on the blades of the ERG Pumpjet, a strongly decelerating ducted propulsor.
		A second impact of the developing axial flow-speed reduction near the passage walls is a local mismatch between the flow angle and rotor surface slope.
	isp.tudelft.nl /abstracts/52.3/3/main.html (257 words)

	Ready to Hit Below the Water
		To meet the requirement of reduced self noise of torpedoes and to make them more stealthy, a pumpjet propulsion system has been developed and integrated with the torpedo.
		Contra-rotating propellers are unable to generate high speed due to cavitation at speed exceeding 45 knots.
		The pumpjet propulsor has been tested to develop more power and low-noise performance.
	mod.nic.in /samachar/dec1-01/html/ch2.htm (911 words)

	Glover Class Frigate Page
		The hull was similar to the retired Garcia (FF 1040) class but carries some modifications including a shrouded "pumpjet" propeller.
		Glover's hull was similar to the Garcia class design but carried some modifications including a shrouded "pumpjet" propeller.
		She was built with the SQS-26AXR bow mounted sonar which was on the first five Garcia class.
	ussbadger-1071.org /menus/frigates/glover.htm (435 words)

	Seawolf sub kits? - Scale Models (Site not responding. Last check: 2007-09-10)
		The two kits available are the Combat Subs (Pitroad) Seawolf and the new Yankee Modelworks Seawolf (NOTE: Yankee Modelworks now has all the former Blue Water Navy molds, now that BWN has folded).
		The Virginia is longer (377 vs 352 ft) and narrower (33 vs. 42 ft) than the Seawolf, thus departing from the ideal hydrodynamic form.
		It has a pumpjet and a considerable amount of automation.
	www.hobbytalk.org /Seawolf_sub_kits-1666676-303-a.html (463 words)

	The LEGUAN FERRY - Armed Forces International (Site not responding. Last check: 2007-09-10)
		The LEGUAN ferry is operated by a ferry commander and by one person per engine, meaning that an MLC 30 ferry has a crew of three persons, and an MLC 70 ferry a crew of five persons.
		The ferry is manoeuvred by altering the speed of the engines and/or the thrust direction of the pumpjets.
		The ferry is very easy to manoeuvre and is normally controlled simply by reducing the speed on one or two engines.
	www.armedforces-int.com /categories/mobile-bridges/the-leguan-ferry.asp (769 words)

	ORCA - Services - Visualisation - Single Photos / Sequences of Photos (Site not responding. Last check: 2007-09-10)
		Additionally, within a sequence of photos (film), processes of motion can be shown for individual components (e.g.
		For Example: "Pumpjet" Propulsion system of Schottel GmbH & Co. KG for the safety boat projected by Arbeitsgemeinschaft Küstenschutz (study group for the protection of the coast)
		Display of "Pumpjet" in a very simplified form.
	www.orca-germany.de /en/leistungen/visual_pic_details.htm (134 words)

	Trumpeter Seawolf work in progress - HobbyTalk
		I've reshaped the sail top, added a beacon to the dorsal rudder, and the new pumpjet shroud is nearly finished (fashioned from a segment of model rocket nose cone).
		The ventral diagonally-placed "shark fins" are also repositioned higher up, as per photos of the real thing and other models.
		A bit blurry, but you can see the pumpjet shroud is in place, and the capstans are painted.
	www.hobbytalk.com /bbs1/archive/index.php/t-104609.html (2985 words)

	Trafalgar (Britain)
		The hallmark of the Trafalgar is the pumpjet propulsion system, available for our model.
		Normally below water (even when the boat is surfaced) the pumpjet surrounds a multi-blade impeller with a truncated cone (or lampshade) shaped duct.
		This provides smooth and quiet propulsion over a wide range of speeds.
	www.otwdesigns.com /Trafalgar/trafalgar.htm (119 words)

	Amazon.com: Submarine: A Guided Tour Inside a Nuclear Warship: Books: Tom Clancy,John Gresham (Site not responding. Last check: 2007-09-10)
		SIPs: pumpjet propulsor, turboelectric drive, nuclear boats, bladed screw, sonar suite (more)
		When tracing the roots of the modern submarine, one is usually faced with a number of different places to start.
		pumpjet propulsor, turboelectric drive, nuclear boats, bladed screw, sonar suite, submarine design, torpedo tubes, vertical launch system, submarine force, escape trunk, antiship missiles, diesel boat, submarine development, sonar array, submarine school, towed array, missile boats, missile tubes, weapons load, other submarines, attack submarine, combat system, submarine operations, pressure hull, silent service
	www.amazon.com /exec/obidos/tg/detail/-/0425183009?v=glance (2292 words)

	Used Outboard Boat Motors For Sale
		I was nervous about buying a motor sight unseen but you made it very easy.
		Amy Wilhelm, MN 30hp Johnson PumpJet Outboard Motor
		The 30 horse is the best thing "Sheila" has ever had on her transom, happy holidays, and once again thanks for making business between Florida and Texas a breeze, I highly recomend AFA Marine, Inc. See Robert's Boat
	www.smalloutboards.com /testimonials.htm (3991 words)

	USS Jimmy Carter (the "F/A-22" of submarines) - Above Top Secret Conspiracy Community
		Most of the following is from Popular Science, but it is made public by the military.
		Like the F/A-22, much of what it has is top secret, but it has a special propulsion design that uses a British-developed pumpjet.
		The details of propeller technology are top secret, because propellers are what generate a lot of noise, so a quiet propeller equates to a quiet submarine.
	www.abovetopsecret.com /forum/thread160298/pg (2000 words)

	Gigi Edgley Secret Life Of Us Chat 6-22-2003 (Site not responding. Last check: 2007-09-10)
		PumpJet: Gigi- you can post you phone number you know!!!
		PumpJet: Thud means when you are around the sandbox the guys pass out
		PumpJet: Hey Gigi- they started a fund to save Farscape
	www.pgniteshade.com /gigienthusiast/gigiarticles/gidotcomchat092002.htm (5459 words)

	Seawolf attack submarine (Site not responding. Last check: 2007-09-10)
		With a diving depth exceeding 0.3 mile, it has been designed with a sub-ice capability, with retractable bow planes.
		Displacement 350 kilotalent surface displacement 425 submerged displacement
		Power Plant One S6W reactor one shaft at with 52,000 shp with pumpjet propulsor
	www.planck.com /talentmileunits/seawolf.htm (179 words)

	Free Resume Example
		"Directed and implemented the pumpjet development project of submarine and torpedo; obtained the substitution effect of about 10 million dollars compared with the direct import."
		"Achieved cost-savings of nearly $10 million by facilitating and executing a submarine and torpedo pumpjet development project."
		In the "Additional" section of your original resume, you had several significant accomplishments that I listed under the appropriate work heading.
	www.resumesamples.info /free-resume-example.html (556 words)

	Submarines RE:What Is Jimmy Carter (SSN25) Up To??? StrategyPage.com
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		I was under the impression that the Seawolf class used pumpjet propulsion, while the NSSN will be using a pumpjet drive.
		Seems to have gotten past the eval phase.
	www.strategypage.com /messageboards/messages/462-812.asp (630 words)

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