Arizona republican., 1917-09-30
OPERATING COSTS
 IF TRAILER MUCH
 LESS THAN TRUCK

The strongest arguments in favor of the adoption of the trailer as ..l. adXlIdry d to the truck are. First, in creased carrying capacity; second, re- duced hauling costs. Economy ana e1uclency in truck trailer operatIOn are insured if due consideration ue gwen the character of the material lU De hauled in it's relation to the trailer equipment, loading and unloading methods, etc. This statement IS Daseu upon the presumption that prelm- mary study of the local hauung con- aiuons has shown that the loads are hard surfaced and that the ndAlInum grades do not exceed ten per cent, according to Babbitt-Polson company, local Troy trailer deaIels
 On long hauls the lowe5 hauling costs are obtained where the tonnage moved per trip is greatest. ln such case the additional hauling capacity afforded by the use of traiier assumes prime importance. II the ,rucK hduls three tons working alone, when with the trailer equipment, it might just as well haul six or more tons at d very slight additional operating expense, the value of the trailer is apparent
 On long hauls the question of speed is an important factor. The trailer must be built to run just as fast as the truck can pull it. A slow speed trailer by limiting the speed or the truck nullifies the advantage to be gained by carrying the double load. If, however, it is impossible to operate truck at it's normal speed, in districts where the traffic is congested. the use of trailer vii offset the loss oc- ca@'oned by the reduced speed.
 Where the hauls are short the item of iUsl time, l. e., the time spent in . first importance. It is imperative therefore fthat this lost time pc le- duced to the minimum. The truck, to be profitable investment must ne kept moving. It is too costly an article to be used as a loading plat form. and should be kept under pay lead as much of the time as possible. This may be accomplished oy the Use of one or more trailers EXCrd uailers may quickly be put in or taken our of service, and when not i'll use represent a much smaller invest ment than the same carrying capacity in motor trucks.
 If only one trailer is used it can be loaded while the truck is making the trip alone, and be picked up by truck every other trip. Two trailers can be used to still better advantage, while q fleet of three trailers makes a very tILlCltll nduiIIlS uIlll, SpeCitlly NtItI t loading and unloading takes up a large part of the trucks time. In the latter case it may be found good practice to use truck only as a tractor and keep it in motion almost cortin ually One trailer may be kept at each end of the haul, whife-truck is in transit with the third trailer.
 To illustrate the importance of util- izing the trailer as a loading ,platform, in place of the more expensive truck:
 A conservative estimate or. operating cost for a five ton truck is $16 day. Every minute this truck is not in mo- tion it costs ? 2-3 cents-eNerss hour S1.60. The. truck not only makes no money while standing stHk+-C loses money. It makes money only while in motion. If it can be kept moving ten hours a day, so much-the- better the profits will be correspondingly greater.
 Say the trailer costs $4 a day to operate, or two-thirds of a cent | minute, or 40 cents an hour. For every hour it is used in place of the truck it saves the difference between S160 and 40 cents. Moreover, to this amount must be added the profit the truck makes when it is kept under nay load: When truck is running i-