Marine Engineer and Motorship Builder, Volume 111890 - Marine engineering |
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2C Glasgow 2C Liverpool 2C London 2C N.Shields accommodation Admiralty amidships armour Belfast berths boats breadth builders built by Messrs cabins Captain Cardiff cargo carrying classed 100 Clyde coal constructed cruisers cylinders deadweight deck designed diameter electric Exhibition firm first-class fitted following dimensions:-Length forced draught forecastle furnaces Greenock guns Hawthorn & Co highest class hull iron knots launched length Limited Lloyd's load Low Walker machinery Marine Engineering measured mile metal moulded Naval order of Messrs owners paddle steamer passengers patent piston plates poop port propeller pumps Railway raised quarter-deck revolutions per minute saloon shaft ship shipbuilding yard Sir Edward Reed South Shields speed steam steering gear steam winches steam windlass Steamship steel boilers steel screw steamer stroke Sunderland superintendence supplied Swansea tonnage tons topgallant forecastle torpedo trade trial trip triple-expansion engines triple-expansion type valve Wallsend water ballast West Hartlepool windlass yard of Messrs
Popular passages
Page 142 - ... salts ; but if care be taken to eliminate these, and if it could be managed to apply this class of protectives hot to warm plates, the question of protection would be practically solved, bituminous and asphaltic substances forming an enamel on the surface of the iron which is free from the objections to be raised against all other protectives, that is, that, being microscopically porous, they are pervious to sea water.
Page 52 - That on the whole the 4-in. armour amidships, from the belt deck to the main deck, associated as it would be with the internal coal bunkers, subdivided into numerous compartments, might be considered satisfactory; but that if armour weight became available, it could be profitably utilised in thickening the 4-in. steel above the middle portion of the belt.
Page 141 - ... and water leaks in, the action becoming more and more rapid, and the blister gradually filling with the result of the action — rust. The blister bursts, but the cone of rust has by this time set fairly hard, and continues to grow from the base, the layers of rust being perfectly visible in a well-formed cone, and when the rust cone is detached, the pitting of the metal at the base of the cone is, as a rule, found to be of considerable depth. The speck of foreign matter which has caused this...
Page 219 - ... little or no effect upon their life and growth. In the same way we find that, with the animal life found on a ship's bottom, the under side is used to cling on with only, and not as an extractor of nourishment, and that, therefore, after the seeds and germs have once obtained a foothold on the side of the vessel, no amount of poison which can be put into a composition will have any effect upon them. Metallic poisons undoubtedly do exert an influence upon the germs in their earliest stages; but...
Page 219 - ... and in most cases it is low price alone which keeps them in the market. The practical proof, given by experience, that poisons alone are unable to secure a clean bottom soon led many inquirers to the conviction that it was the exfoliation in the case of copper which had acted in giving fairly good results, and in many compositions the attempt has been made to provide a coating which shall slowly wash off, and, by losing its original surface, shall at the same time clear away germs and partly...
Page 70 - ... take place nearly instantaneously, and this, the writer considers, is the reason why corrosion is attributed to electric action, whereas the electric action in a steam boiler is really due to the chemical action of the water on the metal of the boiler. In a voltaic couple which may consist of, say, a plate of zinc and a plate of copper immersed in a bath of dilute sulphuric acid, the two plates being connected outside the liquid by a wire, chemical action is set up, and electricity produced in...
Page 70 - ... the iron, but more especially of the steel. This oxidation or chemical action at the time produces electricity, as chemical action always does. When this oxidation takes place in a cold solution, the electric tension exhibited is slight, even though the chemical action be considerable. Though this tension does appear slight so far as instruments show it, yet in fact the amount of electricity produced is proportionate to the amount of chemical action ; but as both the metal and the water are conductors,...
Page 219 - March ; one also begins to realise that the amount of fouling increases enormously if the ship has been long at anchor — ships which have been lying at the mouths of rivers, although quite clean in the brackish water, foul much more rapidly on going to sea than vessels which have been cruising, or even at anchor for the same time, in salt water ; and, finally, certain ports and certain seas seem to exercise a deleterious effeit, both as regards corrosion and fouling, which is not to be found elsewhere.
Page 220 - Another factor which is often overlooked, and which tends to give misleading results, is the action of brackish water, which, in many cases, seems to exert a special action in keeping the bottom of a vessel clean, the fresh water having a tendency to disagree with certain forms of marine growth, whilst the salt water is apparently equally unpalatable to the fresh-water forms of fouling.
Page 50 - ... equally divided on each side of the line of keel. All four of these guns to be available on each broadside. " (2) That the greater portion of the auxiliary (or secondary) armament should be placed in a long central battery, situated between the two heavy gun stations, and so disposed that there should be practically no interference with the fire of any one gun by that of any other. " (3) That in view of the development of high explosives, it was desirable to secure the widest possible distribution...