Arizona republican., 1915-01-24
MOTOR TRUCKS GET
 BEST TEST IN WAR

The European war is the greatest and costliest breakdown test for motor trucks ever instituted. In compari- son, a New York -to-San Francisco test is a pleasure jaunt, whereas four years ago such q run with a motor truck was considered a world sensa- tion. No wonder then, that Amer jean motor truck builders are closely watching how the machines are oper- ating, what features of construction are making good and which need changing.
 At the front is w. F. Bradley an automobile correspondent for syn dicate of American trade journals. Already, Bradley has gained al least as much fame as any of the foreign Journalists, not even excepting Irwin $. Cobb, although his work is not 50 widely known among the tech nical readers of the great public press. Bradley knows whereof he writes, for he has been driving motor trucks. automobiles and ambuanees between Paris and the firing line. He has travelled with the ammunition col umns and supply trains. He has watched the heavy guns moved froni place to place. His findings, there fore. command attention and respect. Briefly, they are as follows:
 Power wagon motors as rule are too large. What is needed. he says, is a iour- cylinder motor with a bore of 3% or 1 inches. With this motor I,1 l.. box, with a W-speed gear that will take the loaded truck over almost any stretch of road that may be en- countered. Accessibility and inter changeability are especially empha sized Higher road clearances are necessary The French army, says Bradley, is demanding Quad type trucks (which drive, brake and steer on all four wheels) for moving artil- lery. The guns must be moved along the stone roads and then taken across fields to the obscure places where they are positioneG. For this work, he says, the Quad type truck is the only successful one
 It is gratifying to Americans that one trucl. made in this country has all of the specifications demanded by Bradley and the French army off cers as those of the ideal motor truck. The Jeffrey Quad has a long stroke motor, with a bore of 3$4 inches and a stroke of 5h inches. It is the most thoroughly standardized truck in the world, even the four wheels being duplicate and interchangeable one with another. as well as the tires and the driving and connected parts. Ii has fewer different parts than any other firstclass motor truck. It drives, brakes ard steers on all four wheels. It has 15A inches clearance under the axles and 24 inches under the transmission. It will run through A inches of water without flooding the carburetor or stopping the motor. It has a four speed gear box, with low gear that will carry it loaded up a 40 per cent. grade or 40 per cent. stepped incline.
 Commenting editorially on Bradley's reports. which are the actual findings of the French army experts in active field service, Motor Age says of the Quad type of truck: The present war Will lend an impetus to this type of vehicle. because it possesses pc culiar merit which cannot be met by the -wheel-drive vehicle" This is an admirable presentation of the case and also a reason why so many hundreds of Jeffrey Quads are being used on the firing line in the great European war.