. The railroad and engineering journal . a canal makes a bend at rightangles, and for ordinary curves it is usually necessaryonly to employ the same pulleys for carrying the cablethat are used at other points, simply giving them an incli-nation to the horizontal greater or less, according to thesharpness of the curve. The method of attaching the boat to the cable is shownin fig. 5, which is an outline sketch. It will be seen that the case. With 16 boats, all loaded, the tractive effort isestimated at 7 tons, and the engines at each station wouldhave to be of about 150 , in order to provide
. The railroad and engineering journal . a canal makes a bend at rightangles, and for ordinary curves it is usually necessaryonly to employ the same pulleys for carrying the cablethat are used at other points, simply giving them an incli-nation to the horizontal greater or less, according to thesharpness of the curve. The method of attaching the boat to the cable is shownin fig. 5, which is an outline sketch. It will be seen that the case. With 16 boats, all loaded, the tractive effort isestimated at 7 tons, and the engines at each station wouldhave to be of about 150 , in order to provide a sulli-cient reserve of power. M. Levy, after having analyzed the irregular movementof traffic on small or branch canals, believes that the onlymethod of providing for this consists in giving the cable aconsiderable tension, calculated in such a way as to keepany oscillations or irregularities of motion within narrowlimits. These experiments have been so far successful that it isproposed to make other applications of the system on the. the towing-rope is attached to one of the eyes clamped onthe cable ; this towing rope is about 20 meters |66 ft.) inlength and carries at its end an eye to which can be hook-ed, or otherwise fastened, the end of the rope attached tothe boat. The method preferred is to attach this to therear end of the boat, connecting it to the forward end bypassing it through an eye reeved into the end of a shortrope fastened to a post. A short cord attnched to the eyeof the towing-rope is provided by which it can be drawndown to the boat when the boatman wishes to attach or todetach it. The main rope used in this case was a steel wire cable31 mm. (I in.) in diameter, while the towing ropes areordinary hemp rope. The main cable has a section of316 sq. mm. and weighs kg. per meter (5 65 lbs. peryard). The boats on this canal, which are chir-fiy used to trans-port coal, sand, and building stone, carry a load varyingfrom 150 to 200 tons. The cable is run at
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
