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A NEW APPARATUS TO SIMULATE ATHLETIC FIELD TRAFFIC

THE CADY TRAFFIC SIMULATOR

^a Dep. of Crop and Soil Sci., Michigan State Univ., East Lansing, MI 48824-1325
^b Dep. of Mechanical Eng., Human Mobility Res. Cent., Queen's Univ., Kingston, ON, Canada
^c Dep. of Plant Sci., The Univ. of Tennessee, Knoxville, TN 37996

View larger version (120K): [in a new window]   Fig. 1. Overall view of the Brinkman Traffic Simulator.

View larger version (159K): [in a new window]   Fig. 2. Overall view of the Cady Traffic Simulator.

View larger version (108K): [in a new window]   Fig. 3. Modifications made to the self-propelled aerifier. (A) Metal spacer system, (B) crank arm adjustment, and (C) simulated cleated foot.

View larger version (25K): [in a new window]   Fig. 4. Cady Traffic Simulator "foot" construction. (A) Angle iron (9.5 mm thick, 15.2 cm wide) fastened to piece of tire using four 8.0-mm carriage bolts and stop nuts, (B) piece of tire (45.7 cm long by 15.2 cm wide) looped with tread side out (preferably 8-ply, load range D), (C) steel plate fastened to piece of tire using four 8.0-mm carriage bolts and stop nuts, and (D) bottom view of steel plate, showing four carriage bolts with stop nuts and three screw-in cleats.

View larger version (34K): [in a new window]   Fig. 5. Direction of travel and relative direction of forces measured for the Brinkman Traffic Simulator and the Cady Traffic Simulator. (A) Top view of the Cady Traffic Simulator. The directions of travel are shown along with the directions of the measured forces. (B) Direction of forces for the various feet when operated in the forward direction. (C) Direction of the forces of the various feet when operated in the reverse direction. (D) Side view of the Brinkman Traffic Simulator showing the directions of the front/back forces applied by the rollers.