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5. Special Report

Title:	Traction aid for wheeled vehicles
Authors:	United States. Army Tank-Automotive Command. Hanamoto, Ben.
Keywords:	Ground vehicles Mobility Operation Tire chains Tracked vehicles Traction Vehicles Vehicle tracks Wheels Trafficability Tyr-Trac
Publisher:	Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.)
Series/Report no.:	Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 232.
Description:	Special Report Abstract: Performance tests with the Tyr-Trac traction aid device for wheeled vehicles had been conducted in Alaskan snow, and the results were so encouraging that further testing of the device was requested. In comparison to tire chains, the Tyr-Trac out-performed chains in all areas of operation: slope climbing, snow drifts and deep snow conditions. Additional tests were conducted in northern Michigan, comparing the drawbar pull-slip performance of an M35-A2 2 and 1/4-ton, 6 x 6 truck equipped with the Tyr-Trac, tire chains and with standard military tires at an inflation pressure of 15 psi. The results of these tests in no way duplicate the Alaskan results. Traction aids were of no use in snow deeper than 20 inches. Tests could be conducted only by reducing the snowcover to a depth of 12 to 17 inches Under these conditions both Tyr-Trac and chains performed equally, with a drawbar pull to weight ratio, DBP/W, equal to about 0.10. If traction aids were to be used in shallower snow, tire chains would be preferred over the Tyr-Trac for these reasons: less weight and bulk for more convenient on-board stowage, more economical, and easier installation and removal in the field.
Rights:	Approved for public release; distribution is unlimited.
URI:	http://hdl.handle.net/11681/11761
Appears in Collections:	Special Report