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Topic: Propeller shaft

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	Patent 5249995: Marine drive having two counter-rotating surfacing propellers and dual propeller shaft assembly
		Needle bearing 66 is positioned between propeller shaft 42 and bearing support housing 48 in extended bearing support portion 64 such that the propeller shafts are supported over a length to prevent bending of the propeller shafts during the surface operation of the propellers as the propellers strike and pierce the surface of the water.
		Propeller 12 is mounted on inner propeller shaft 40 between ring 134 and nut 140 and is engaged forwardly at tapered outer surface 138 of ring 134, and is engaged rearwardly at tapered outer surface 142 of nut 140.
		Propeller 14 is mounted on outer propeller shaft 42 between ring 150 and nut 156 and is engaged forwardly at tapered outer surface 154 of ring 150, and is engaged rearwardly at tapered outer surface 158 of nut 156.
	www.freepatentsonline.com /5249995.html (4244 words)

	feathering sailing boat propellers QA
		When no drive is applied via the propeller shaft and the vessel is under sail, water flow past the propeller blades forces the propeller hub to rotate around the stationary shaft until the blades align with the water flow and cease rotating the hub.
		Most current self-feathering propellers have a gear connected to the propeller shaft, the gear and shaft are free to rotate within the hub of the propeller, but are limited in the extend of their travel by some form of limit stops.
		This means that once the propeller shaft and blades have rotated to the correct position and up to the limit stops, all engine torque used to physically drive the propeller is transferred directly from the shaft to the propeller hub and blades, not via the gear mechanism.
	www.steeldevelopments.co.uk /feathering_sailing_boat_propell.html (4784 words)

	Propeller Hub Cracking
		The nature of the propeller blade is such that it tends to absorb the greater part of the impact sustained by the propeller, and there is nothing in the literature of propeller design to indicate that the propeller hub is ever considered vulnerable to damage from impact alone.
		Propeller manufacturers would be well advised to include such holes in new propellers, and to adopt standards for or at least recognize the relationship of bolt hole and propeller hub or shaft diameters.
		Regardless of the reliance of the owner on the judgment of either the shipyard or propeller repair shop, the fact remains that the ultimate responsibility rests with the owner or his representative to require that the necessary inspections be made and to require of the shipyard or propeller shop a report of their findings.
	www.purgit.com /propell.html (2679 words)

	1935 Chevy Shop Manual: Propeller Shaft Assembly
		140, between the rear axle propeller shaft and the universal joint on the rear of the transmission.
		The front end of the propeller shaft assembly is splined to fit the universal joint on the rear of the transmission and the rear end of the shaft is splined to fit the front yoke of the rear universal joint.
		Remove the rear yoke from the end of the rear axle propeller shaft and the ball and collar from the rear axle propeller shaft housing.
	www.old-carburetors.com /1935-Chevy/062.htm (581 words)

	Propeller Modification for Recovery of Decreased Propeller Shaft Speed
		In case where a main engine comes to torque-rich condition in spite of applying a margin to propeller speed in the design stage of a propeller, measures to cope with this torque-rich condition are the reconditioning of the main engine, the cleaning of the surface of the hul1,and the cleaning and modification of the propel1-er.
		When decreased shaft speed is recovered by the modification of the propeller, the polar moment of inertia of the propeller decreases in case of the method by washback modification on the trailing edge side of the propeller blade under 3.1.
		As methods of recovering decreased shaft speed, that is, measures to cope with torque--rich condition, the reconditioning of the main engine,the cleaning of the surface of the hul1, and the cleaning and modification of the propeller to date.Among these methods, the modification of the propeller is commonly adopted, since it is effective and economica1.
	www.mesj.or.jp /mesj_e/english/pub/english/text/mv20n021992p80.html (2484 words)

	Propeller Shaft Assemblies (Site not responding. Last check: 2007-10-06)
		Vehicles, having a long wheel base, are equipped with a propeller shaft that extends from the transmission or transfer case to a center support bearing and a propeller shaft that extends from the center support bearing to the rear axle (fig.
		The hollow shaft, because it rotates at high speed, must be balanced to prevent vibration and premature bearing failure in the transmission and differential assemblies.
		A universal joint acts as a flexible coupling between two shafts and permits one shaft to drive another shaft that is at an angle to it.
	www.tpub.com /eqopbas/23.htm (482 words)

	Boat Seem Underpowered?
		With a "normal" bronze propeller, a zinc is installed on the stainless steel shaft to serve as a sacrificial anode.
		This is necessary since the bronze propeller attached to the stainless steel shaft in a saltwater environment creates a galvanic couple [a very noble metal (shaft) electrically connected to a less noble metal (prop) immersed in an electrolyte (saltwater)].
		The addition of the zinc (a metal which is less noble than either the shaft or propeller) to the shaft prevents deterioration of the propeller as the zinc is then sacrificed.
	www.atomic4.com /propeller.html (1007 words)

	NAUTICALweb - The propeller shaft bracket
		The purpose of the propeller shaft bracket is to support the propeller shaft and the propeller.
		Section design and the number are determined by the shape of the hull, the length of the propeller shaft and the operational features of the vessel.
		A main cause of vibrations in a vessel is the variation of flow on the airscrew disk, so the bracket must not aggravate these conditions; it must, as much as possible, be designed and built to avoid the destructive effects of erosion due to cavitation.
	www.nautica.it /superyacht/513/tecnica/propeller.htm (2041 words)

	Patent 4218185: Flexible fluid conduit for propeller shaft
		The conduit is formed of split annular rings adapted to be mounted over a propeller shaft, the rings being interconnected to form passages for directing air pressure from the A-bracket through relative rotating seal members and into the body of the propeller.
		Second, the propeller and its shaft are subject to axial movement of, in some cases, one and one-quarter inches as well as radial movement.
		Finally, the propeller shaft 12 is subjected to bending forces which must be accommodated by the conduit 10.
	www.freepatentsonline.com /4218185.html (2187 words)

	Propeller shaft assemblies (Site not responding. Last check: 2007-10-06)
		The propeller shaft may be solid or tubular.
		A solid shaft is stronger than a hollow or tubular shaft of the same diameter, but a hollow shaft is stronger than a solid shaft of the same weight.
		The usual type of slip joint consists of a splined stub shaft, welded to the propeller shaft, that fits into a splined sleeve in the universal joint.
	www.tpub.com /machines/13f.htm (276 words)

	Accurate Propeller
		The tapers of both the shaft and propeller hub should be in contact over 75% of their surface area to transmit power effectively and without undue stress.
		In this procedure, it is assumed that the tapers of both the shaft and propeller are made to the same specifications and with a taper of 3/4 inches on diameter per foot.
		Install the propeller on the shaft taper(ensure that the propeller is fully seated on the taper) and turn it slowly by hand, one full rotation.
	www.fishbox.tv /accurate (1417 words)

	Propeller Shaft Removal (Site not responding. Last check: 2007-10-06)
		But if your shaft has not been removed in several years and is stuck to the coupler because of rust, the tool becomes lethal.
		With a mighty bang of the sliding hammer the shaft moved a foot or more, “but what was that sound hitting the bottom of the boat?” “Ah it’s probably the packing gland nut falling off the end of the shaft.” “No, it sounded larger than that,” I said to my friend.
		The transmission housing was broken, the transmission gear shaft was pulled completely out of the transmission and to make matters worse, the coupler, still attached to the shaft, was wedged between the subfloor and the bottom of the boat.
	catalog.com /bobpone/diyShaftRemoval.htm (1023 words)

	SubConcepts - Sub Guide - Propulsion - Propeller Shaft (Site not responding. Last check: 2007-10-06)
		The propeller shaft assembly provides a connection through which power is transmitted from the motor to the live axle.
		Prop shafts must be of hard material and require a smooth surface if drive shafts sealing rings are used and therefore the material of choice should be VA which is a stainless steel.
		Propeller shaft straightness tolerances should also be considered and remain within a thousandths of a centimeter tolerance.
	www.subconcepts.com /SubGuidePages/PropShaft.html (2798 words)

	Propeller shaft bearings, whirling vibration - Boat Design Forums
		Shafts are about 13 meters each ( in 3 parts joined via SKF couplings), supported on a V bracket (aftermost) an intermediate bracket and the sterntube.
		The shaft lines are too long, this is 3-part shaft system, 6-inch in diameter, shaft parts coupled together with SKF couplings.
		You could also arrange for strain gauges to be placed on the shafts (and or bearing housings) and the data transmitted to remote recording equipment while the boat is underway - I have seen this reveal unexpected torsional harmonics in large drives.
	www.boatdesign.net /forum/showthread.php?t=3660 (682 words)

	Propeller Manufacturer India Asia End-Suction Pumps Hydro Turbine Retrofit Pumps
		The propeller is secured firmly to the shaft by means of a key and locking collar.
		Vertical propeller Pumps may be arranged for electric motor, (either solid or hollow shaft), diesel or gasoline drivers.
		The stainless steel propeller shaft is designed with extra length to ensure permanent shaft alignment properly engineered water lubricated rubber bearings are provided in the pump bowls.
	www.flowmorepumps.com /propeller.htm (753 words)

	advice on propeller shaft seal (Site not responding. Last check: 2007-10-06)
		I repaired that for her, but when I wiggeled the propeller shaft when reattaching it to the V-drive, water gushed past the shaft seal.
		My fear is that the seal may have been damaged when the shaft hub bolts broke and the shaft wobbled off center for a while.
		Is it normal for a shaft seal to leak like this when wiggled a little or should I advise her to drydock the boat for a new prop shaft seal?
	www.boatinglinks.com /_disc4/0000005b.htm (132 words)

	Marine propeller installation - boat prop instalation
		Liberally coat the tapered end of the shaft and the bore of the propeller with the grinding paste.
		Apply gentle pressure and rotate the propeller on the shaft 90° to the right, then 90° to the left and repeat this several times.
		If it doesn’t, the propeller is sitting on the key and you must reduce the height of the key to overcome this problem.
	www.propscanusa.com /propeller_checklist.htm (727 words)

	Propeller Shaft Removal (Site not responding. Last check: 2007-10-06)
		Loosen the set screw on the shaft coupler which is attached to the rear of the transmission (see figure 1).
		The transmission housing was broken, the transmission gear shaft was pulled completely out of the transmission and to make matters worse, the coupler, still attached to the shaft, was wedged between the sub floor and the bottom of the boat.
		The reason to cut the coupler instead of the shaft is purely economical.
	captain-miles.no-ip.com /ShaftRemoval.htm (1024 words)

	ÃÀ¹ú×¨ÀûÉêÇë¹«¿ªËµÃ÷Êé 20040082394 - Hybrid propeller shaft made of metal and composite material ... (Site not responding. Last check: 2007-10-06)
		The composite material prepregs is co-cure bonded while applying an axial compressive preload to the transmission shaft and creating a vacuum in a space between a vacuum bag inserted in the transmission shaft and the composite material prepregs of the transmission shaft.
		Teeth 43 or embossments 44, and adhesive-retaining grooves 45 are formed on inner surfaces of the metal yokes, so the transmission shaft is desirably compression-fitted into the metal yokes.
		Accordingly, the propeller shaft has advantages of securing improved impact, abrasion, and water resistance.
	cxp.paterra.com /uspregrant20040082394cn.html (140 words)

	MSN Encarta - Search Results - propeller shaft
		Propeller (mechanics), mechanical device that produces a force, or thrust, along the axis of rotation when rotated in a fluid, gas or liquid....
		Command Key, in computer science, on the original Apple Macintosh computer keyboard, a key labeled with a special symbol, sometimes called the...
		Shaft (motion picture), motion picture about a fl detective who finds time to seduce several women while tracking down a kidnapped girl and...
	encarta.msn.com /propeller+shaft.html (165 words)

	AllRefer.com - marine engine (Naval And Nautical Affairs) - Encyclopedia (Site not responding. Last check: 2007-10-06)
		Steam turbines having 1,000 shaft horsepower and more are used for the most powerful ships.
		A few small boats are propelled by a pumped jet of water.
		This arrangement makes possible the combination of a relatively large power plant with the convenience and maneuverability of an outboard installation; e.g., the propeller may be tilted up in order to beach the boat.
	reference.allrefer.com /encyclopedia/M/marineen.html (389 words)

	SkiBoatHelp.com Technical Articles - Inboard Propeller Shaft Seals (Site not responding. Last check: 2007-10-06)
		It is essential that there is some "shaft seal" 83 lines, 4622 characters up of basically string wrapped tightly around the shaft, and then compressed via the nylon lock nut.
		Shaft seals are designed to prevent water coming into the boat through the shaft log.
		In either instance, because shaft seals are more expensive, you need to be careful which one you purchase.
	www.skiboathelp.com /tech/propseal.html (676 words)

	Engine Replacement
		Secondly, the propeller must have clearance from the hull of at least 15% of its diameter to operate efficiently.
		When the pitch is increased to the point that it equals the diameter of the propeller, called a blocked wheel, the efficiency of the propeller is reduced.
		Using the cutlass bearing, the shaft stern tube, the coupling attached to the template and the front target on the template, it was a simple matter to align the engine.
	www.sailpolaris.com /Engine%20Replacement.htm (3093 words)

	Propeller shaft taper (Site not responding. Last check: 2007-10-06)
		Our standard shaft is only tapered at one end and fits into a non-tapered flange with key and set screws.
		Unfortunatly, manufacturers of of the double tapered shafts have not used a common standard for the taper.
		In order for us to match the shaft you have, we need to know the diameter of the "minor dimension" of the taper.
	www.glen-l.com /inboard/shaft.html (111 words)

	Definition of Motorboat
		A motorboat generally speaking is a vessel other than a sailboat or personal watercraft, propelled by an internal combustion engine driving a jet or a propeller.
		A speedboat is a small motorboat designed to move quickly, used in races, for pulling water skiers, as patrol boats, and as fast-moving armed attack vessels by the military.
		A direct drive has the powerplant mounted near the middle of the boat with the propeller shaft straight out the back, where a v-drive has the powerplant mounted in the back of the boat facing backwards having the shaft go towards the front of the boat than making a 'V' towards the rear.
	www.wordiq.com /definition/Motorboat (333 words)

	Drive Shafts of Tulsa;Drive Shaft:Custom drive shaft, agriculture shaft, aluminum drive shaft, driveshaft, heavy duty ...
		We specialize in providing drive shafts to industries such as Construction Equipment, Paper Processing, Food Processing, Material Handling, Transportation, Energy Systems, Truck Body, Agricultural, Steel Mills, Bottling and Marine.
		We repair and balance all types of drive shafts, including pick-up and van shafts, PTO shafts and steering shafts, automotive and race car shafts, industrial and agricultural shafts, front wheel drive shafts, heavy duty shafts, 4-wheel drive shafts and axle shafts.
		We custom design and create drive shafts from premier quality component companies to meet custom industry needs.
	www.driveshaftsoftulsa.com (163 words)

	Part 4 - Propeller Shaft Installation (Site not responding. Last check: 2007-10-06)
		With the stern planes in place, it was necessary to install the shafts first and then screw the propellers on.
		The shafts were not sealed into the hull itself, but rather in the WTC.
		First, they prohibit the shafts from traveling aft, and second, they are anchors for CA glue.
	www.hrfsbo.com /sub/prop4.htm (306 words)

	Propeller shaft
		Scientists excavating the Hunley's interior on Wednesday got their first look at the Confederate submarine's propeller shaft.
		Archaeologists removed another couple of buckets full of sediment from the hole in the submarine's starboard stern and Dr. Scott Harris, a scientist from Coastal Carolina checked out the layers of silt inside to see if it told anything about how long it took the submarine to sink into the sea bed.
		With part of the rear hole in the sub cleaned out, scientists can see the shaft that turned the propeller and another one mounted along the top of the submarine that, somehow, controlled the rudder.
	www.thehunley.com /Engineering/propshaft.htm (570 words)

	Roc Spicer (Taiwan) - rear, axle, propeller shaft, accessories .
		Roc Spicer Ltd. Home : Products : Description: allproducts.com - Roc Spicer Manufacturer - carrier, differential case, hypoid gear, axle shaft, rear axle, propeller shaft asst, yoke, spokes & nipples, hubs, chain wheels, saddles products for wholesalers, importers, volume buyers.
		Not only is DANA a business partner, but also engages in a technological joint venture with Roc-Spicer in designing and manufacturing rear axle propeller shafts for light duty vehicles.
		Not only are our products installed on most of the locally produced rear driven vehicles in Taiwan but also many key components such as Gleason gear sets, axle shafts, and yokes are exported to South America, America and pacific rim countries.
	www.allproducts.com.tw /manufacture9/rocspicer/supplier.html (193 words)

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