Transactions . ble to further improve any other existing typeof vessel in point of speed, coal consumption, horsepower, anddeadweight cargo and bunkers. In the manipulation of coal cargoes this type can be arrangedwith hatches as large as any type now on the market; it canhave equally long holds with equal freedom from obstructions;and it can be designed to be absolutely full without trimming,and to have all spaces occupied. Any required amount of water-ballast can be arranged to suit the draft, trim, and stability. Itbecomes, therefore, a suitable vessel on which any system ofbelt arrangement
Transactions . ble to further improve any other existing typeof vessel in point of speed, coal consumption, horsepower, anddeadweight cargo and bunkers. In the manipulation of coal cargoes this type can be arrangedwith hatches as large as any type now on the market; it canhave equally long holds with equal freedom from obstructions;and it can be designed to be absolutely full without trimming,and to have all spaces occupied. Any required amount of water-ballast can be arranged to suit the draft, trim, and stability. Itbecomes, therefore, a suitable vessel on which any system ofbelt arrangement can be fitted up and carried for the discharg-ing of cargo. A vessel of this type (Fig. G) is now under construction at theshipyard of Messrs. Osborne, Graham, & Company, of Hylton,near Sunderland. It is claimed for this type that the improve- VARIOUS TYPES OF COAL CARGO-STEAMERS. 263 nients (namely, the increased capacity of the water gained bythe semi-circular arcs along the sides of the vessel and other. features) give an increased carrying capacity over the first threepreceding types of boats of 14 per cent. 264 VARIOUS TYPES OF COAL CAEGO-STEAMEES. (6) Vessels arranged to unload by Grab-gear.—Fig. 7 repre-sents another type of boat as constructed by Messrs. WilliamDoxford & Sons, Limited, of Sunderland. The vessel is arrangedso that the coal gravitates towards the centre of the hatches,owing to the tank top being sloped up towards the vessels sides. Similarly to the other types of self-trimmers, these vessels aremade with exceptionally large hatches, so as to facilitate theloading; and, as the capacity is arranged to suit all kinds of coal,they are capable of loading the whole of their deadweight, andare, in fact, capable of taking about one-third of their dead-
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Keywords: ., bookcentury1800, booksubjectmechan, booksubjectmineralindustries
