Engineering and Contracting . n the gasoline costwhich now amounts to almost 15 per cent of the usually sell for 30 to 35 per cent and distillate for50 to 60 per cent of the price of gasoline. With a properlydesigned carburetor, the available power in the lowergrade fuel will be about the same as in the gasoline,but the carbon deposition will probably be somewhatgreater. A TRACTOR AND SEMI-TRAILER CONTRACT-ORS HAULING OUTFIT. The illustration shows a tractor and trailer combina-tion for contractors hauling which has a number ofspecial features. The trailer carries the load, about 70
Engineering and Contracting . n the gasoline costwhich now amounts to almost 15 per cent of the usually sell for 30 to 35 per cent and distillate for50 to 60 per cent of the price of gasoline. With a properlydesigned carburetor, the available power in the lowergrade fuel will be about the same as in the gasoline,but the carbon deposition will probably be somewhatgreater. A TRACTOR AND SEMI-TRAILER CONTRACT-ORS HAULING OUTFIT. The illustration shows a tractor and trailer combina-tion for contractors hauling which has a number ofspecial features. The trailer carries the load, about 70per cent of the weight of which is on the rear steel-tired wheels and the tractor pulls the load. The trailershown has a 120-cu. ft. dump body, but any special formof body required by the character of the load can beused. The trailer is quickly coupled and uncoupled andit is common practice to use three trailers with onetractor, one being loaded, one being hauled and one atdestination being unloaded. Any other of several sim-. Tractor and Semi-Trailer Contractors Hauling Outfit. ilar combinations of trailer and more than one trailercan be effected to suit the conditions. With the com-bination as shown by the illustration a turn can bemade without backing in a 31-ft. circle and by backingthe train can be turned in a 20-ft. street. The wheelbase of the tractor is only 80 in., and that of the traileris 11 ft. SVo in., Jn addition to its short wheel base thetractor has the feature of an independent spring sup-ported from plant sub-frame. None of the load comes onthe springs of this sub-frame, but on the heavy springsof the main frame. There are two separate sets ofsprings, one set adjusted to the light constant load ofthe power plant, gasoline tank and drivers seat, and asecond set for the tractor frame proper. The tractorhauling unit as illustrated has been tried out for a sea-son on actual contract work and is marketed with fullassurance by the builders of its efficiency. The bui
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicago, bookyear19
