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Show TRAILERS DN TRUCKS NOW COMMON SIGHT Landes Agent Explains Relation Re-lation of Truck to the Car Behind. Nearly every owner and operator of a motor truck has at some time figured on using a trailer in connection with the operation op-eration of the truck. There are very few-truck few-truck owners who know what trailer drawing energy their truck develops, and it is this knowledge that is so necessary for successful trailer installations. Any motor truck that is built along good motor truck principles of design and construction develops a draw-bar pull, in -pounds, of one-half its rated capacity, even when it is pulling its rated capacity. For example, a three-ton motor truck will handle its full Io?d and be wasting a draw-bar energy of practically 30x pounds if a trailer" is not used. .The drawbar draw-bar power required to pull fe- ton of freight on a well-designed trailer runs from fifty pounds on a paved street to 260 pounds on a country dirt road. Consequently, Con-sequently, (he maximum trailer carrying power of a three-ton truck would be twelve tons in addition to the load on the truck itself. On a l per cent grade this : capacity would be reduced o per cent, on I a 2 per cent grade it would he reduced 10 per cent, and so on up in like propor-I propor-I tion. The practical truck-trailer opera- tion is from one to two times the truck capacity on the trailers. H. C. Legg of the Ixindes company of Salt Lake has followed the operation of a greit many Troy trailers which are in use throughout the intermountain territory, terri-tory, and some very interesting data has been gathered. The summary of the various va-rious investigations has been "that the capacity ca-pacity of the average motor truck can be increased practically SO per cent when a trailer jis used in connection with it-While it-While the capacity has been increased this much the increased cost of operation has i only increased 25 per cent. This 25 per cent denotes the maximum increase and some of the joint units have been operated oper-ated with only 12 per cent increase over the cost of operating the Truck alone. However, with the 50 per cent increase of efficiency and only 5 per cent in crease for expense, the net profit on the hauling has been increased 322 per cent. Or, in other words, a truck That will pay for itself in 400 working days with the profit it makes on its hauling, when used for custom work and when it is used alone, will, with the same base for profits, pro-fits, pay for itself in 178 working days when a trailer is used, and also pay for the trailer at the same time. The trailer, , with the same base for profits, will pay 1 for itself in seventy-two working days 1 and will then start to pay for the truck. Landes & Co. have made a very thorough investigation of the possibilities of the Troy trailers for use in different kinds of hauling problems In the western country and have a great many successful success-ful installations working In and around Salt Lake- City. |