MIL-DTL-11891 Track Shoe Sets, Track Shoe Assemblies, Track Shoe Pads And Track Shoe Bushings, Vehicular: ElastomerizedThis specification identifies the requirements for qualification and production control of track systems supporting U.S. Military Tracked Vehicles. This specification is intended primarily for the qualification of elastomeric compounds used in the fabrication of track and track components and to ensure that the quality and performance established at qualification is maintained throughout production. The contractor is held fully responsible for the entire assembly/component including all non-elastomeric components and fasteners.

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MIL-DTL-11891G(AT)

APPENDIX C

C.3.3 Test program scope. This test will be accomplished by assembling the

manufacturer's T107 track samples on an M88 series vehicle and operated to the requirements of

this appendix.

C.3.4 T107 Track design characteristics. The T107 track is a double-pin track with an

integral pad. See figure 16 for a T107 track illustration with an associated parts listing.

C.3.5 Test course. The test course to be used for conducting all on-vehicle qualification

tests will be selected by the Preparing Activity. The preferred course is located at the U.S. Army

Proving Ground (YPG), Yuma, Arizona. Yuma has been traditionally selected for on-vehicle

track testing because of climate, course, and test result consistency. The following standard track

laying vehicle (tank and other tracked vehicles) test courses at YPG are designated for testing

track for this specification.

Paved course. The dynamometer course is a 2-mile, smooth, near-level

(0.8 percent grade) 30-foot wide roadway with 500-foot radius turnarounds at

each end, surfaced with a high strength asphalt. The course is located at an

elevation of approximately 470 feet above sea level and is staked at 0.1-mile

intervals throughout its length with accurately surveyed distance markers.

Gravel course. The tank gravel course is a 3.6-mile compacted and graded gravel

course and is for testing track laying vehicles under conditions simulating a

secondary gravel road. The course consists of short straight sections and curves of

varying radii with many moderate and sharp turns.

Hilly cross-country course. The tank hilly cross-country B course is 2.7 miles long

and has short steep grades (35 percent) with a greater proportion of slopes less

than 20 percent. This course has surfaces varying from sand and gravel to exposed

bedrock. The loose gravel, sharp stones and rocks present a severe cutting and

abrasion problem for tracks and roadwheels.

Level-cross country course. The tank level cross-country course traverses areas of

level, sandy terrain with many bumps that provide a severe test of track laying

vehicles. The dust conditions are typical of cross-country operation on dry soil.

One lap is 6.7 miles.