Arizona republican., 1915-10-24
The Simplicity of Design, Coupled With Inter- changeability of Parts, Prime Requisites for the Truck for Army Service
DRIVE
 HAS VARIOUS USES
Hauls Great Cannon, is the Basis for Armored Cars, Carries Supplies, Includ- ing Complete Wireless Stations


 Shortly after the start of the great European war, the military transport officers at the front dis covered many undesirable features in the ordinary motor car of com merce as regards It's applicability for active military service. w. F. Bradley, a well known motor truck journalist at the front. sent home several convincing articles crlticis- ing the construction of motor trucks. MT. Bradley was merely re- flecting the views of the army transport officers at the front when he openly advocated the use of q four-speed transmission, a differen- tial lock, a relatively small high speed motor, a large and easily filled gasoline tank, interchange able carburetor and magneto, drain cocks on the radiator and on the water iac c<et of the motor, and cer tain other design features.
 In the army transportation ser vice in the European war. at least on the western front, there are two diffrent phases: l. Transportation on good roads up to within a few miles of the firing line. ,. Trans portation on bad roads in the ter ritory traversed several times by the opposing armies and more or less badly rutted by thousands of vehicles and possibly damaged by artillery fire.
 It is on the bad roads, damaged by heavy vehicles of all kinds and sometimes by shell fire that most of the trouble of motor trucks in the war have occurred.
 A tyne of motor truck peculiarly fitted to the operating conditions that arise in active army service has been developed in this country. The truck referred to drives, brakes and steers on all four wheels. 1t is known as the Quad. It combines the quality of performance demand ed by Uncle Sans army officers to go anywhere a four-mule team will go-with the more detailed re- quirements which have been shown so necessary by the lessons of ac- tive service on the European fight ing line.
 The motor is situated partly under the floor boards and partly under a hood in front of the driver. to | the right The motor drives through l a dry-disk clutch and a longitudinal shaft to four-speed transmission l situated about the middle of the | chassis. This four-speed transmits
 sion is of the selective type with 1 the forward speed gears constantly | in mesh. The speed changing IS effected by dog clutches. broad silent chain drives from the inter mediate spindle of the transmission to a shaft which runs right through l the transmission so that the power is taken from both ends. At each end of this shaft is connected propeller shaft Cwith universal joints at each erd) which drives the power avle through a pair of bevel gears and the differential that has already been mentioned Each differential casing is bolted firmly to it's re- spective dead axle, as the weight of the vehicle is supported on two dead axles, and not carried, even in part by the power aXles.
 The final drive is by internal gears in each of the four wheels The power axles. which emerge one from each end of the differential, con- meet through a universal Oakland sockeO joint with a pinion that meshes with an internal gear fixed firmly in an opening on the inside face of the road wheel The ball. and socket connection between the 1 power axle and the driving pinion in l each wheel permits the wheels to he l steered at an angle to the live and | dead axles.
 Broadly, it may be said that the ! truck is the same front and rear, | with the exception of the transmits sion. controls and the motor wits it's necessary adjuncts. Thus the four wheels are exactly alike and in