We tested the Abrams tank back in the 1970's at Aberdeen Proving Ground. Their were two pilot models for testing one made by General Motors and the other built by Chrysler with the turbine engine. We used this vehicle for drawbar pull plus we had the M88 Recovery Vehicle gas version connected to the last trailer in reverse when the M1A1 was in the lower gears. Both vehicles pulled over 100k pounds of drawbar pull. Chrysler hired a retired bird colonel to get them to go with the Chrysler version. We had to have a heat deflector made so that hot exhaust wouldn't burn the paint off the dynamometer. This was one of the largest projects I worked on in 41 years. Hal
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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