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TESTING REPORT <br />DATE: 26 July 2007 <br />SUBJECT: Trash carts <br />PRODUCT IDENTIFICATION: MSD-95M <br />TEST: WIND TUNNEL <br />TEST DESCRIPTION: This test is a measure of the stability of the cart in a high wind. <br />Although not specifically tied to the basic purpose of the cart, most consumers would object to a <br />cart that often tipped over and spilled the contents. <br />MINIMUM PERFORMANCE STANDARD: The specification varies from site to site <br />depending upon prevalent wind conditions, etc. Most manufacturers expect the cart to be stable <br />up to at least 30 mph. <br />TEST PROCEDURE: <br />1. A large wind tunnel with a 54 inch diameter exit opening is used for the test. The wind <br />was supplied by a Gates Super HC drive. <br />2. Position the cart 48 inches from the end of the exit opening. (Beyond stagnant air zone.) <br />3. The bottom of the cart is to be level with the exit opening and is to rest on a concrete <br />surface that has a surface texture similar to a roadway. <br />4. The bottom of the cart is placed against a 6 inch brace (like a curb) to prevent the cart <br />from rolling or sliding. <br />5. The wind velocity is raised until the cart starts to move. This wind speed is measured <br />using a certified volometer. <br />6. Measure the air velocity to tip the cart, either free-standing or against the curb if it has <br />rolled or slid. <br />7. Test cart in three orientations toward the wind tunnel opening — front, side and back. <br />8. The procedure was performed using a blow -molded wheel and then repeated using an <br />injection molded wheel with rubber tread. <br />TEST RESULTS: <br />Orientation Towards Wind Tunnel <br />Test <br />Front Side I Back <br />Wind speed to 47 mph 56 mph 57 mph <br />tip the cart <br />SUMMARY: The cart was stable in moderate to high winds. <br />A. rciff Strong <br />Professor, Manufacturing Engineering <br />Brigham Young University <br />265 CTB, Provo, UT 84602 <br />