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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Drag and Steering Effects From Disablements of Run Flat Tires</title>
      <link>https://trid.trb.org/View/1787407</link>
      <description><![CDATA[This paper is the third part of a series of vehicle tests designed and conducted in order to further the understanding of vehicle handling and responses associated with a tire disablement event. The first two parts were published in SAE 970954 Drag and Steering Effects of Under Inflated and Deflated Tires [1], and SAE 1999-01-0447 Drag and Steering Effects from Tire Tread Belt Separation and Loss [2]. All of the test results included herein are presented in a manner to facilitate direct comparison to the previous test programs. Under inflated or deflated tires are known to cause increased forward drag and lateral steering effects on vehicles. These effects are commonly suggested to be the cause of driver loss of control and subsequent vehicular accidents. The increased drag and induced steering effects of under inflated and deflated tires are frequently an issue in an accident reconstruction. In the referenced previous publications, the authors presented vehicle handling response for a range of passenger vehicles that included replicated testing of vehicle handling during and after an air-out disablement, and the results of replicated testing of highway speed tread belt separation test results for a mid-size front wheel drive four door sedan. The authors have collectively been involved in the testing of multiple sudden air-out disablements and forced tread belt detachments involving passenger cars. This publication addresses a similar series of tests which were conducted to obtain comparative drag and lateral steering effects after the disablement of current generation zero pressure, or run flat, type of tires such as those equipped on some upper end vehicles in recent years. These tests were conducted in accordance with the test protocol defined in SAE 970954 [1]. Vehicle handling and response characteristics were evaluated during and after a disablement of a zero pressure run flat tire.]]></description>
      <pubDate>Mon, 23 Dec 2024 10:40:41 GMT</pubDate>
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      <title>DRAG AND STEERING EFFECTS FROM TIRE TREAD BELT SEPARATION AND LOSS</title>
      <link>https://trid.trb.org/View/638464</link>
      <description><![CDATA[To evaluate the effect of the loss of a tread belt without tire deflation, the authors tested tires prepared so that the tread belts could be intentionally separated while driving at speeds between 50 and 75 miles per hour. The initial phase of the test was conducted at theTransportation Research Center (TRC) in East Liberty, Ohio on the Vehicle Dynamics Area track. The test vehicle was a 1993 Ford Taurus four door sedan. Twelve tires were tested on the TRC track. Three were tested at each wheel position. Nine tread belt detachments were produced on a straightaway. Three detachments were in curves or during a driver induced steering manoeuvre. The tread detachments occurred at speeds between 50 and 75 miles per hour. All tread belts separated in one continuous piece, with two or three small fragments in some cases. All of the authors were involved as test drivers and passengers to introduce a range of driver skills and responses. The vehicle speed, forward and lateral acceleration rates, and the driver induced steering torque was measured and recorded. Separate tests were conducted to obtain comparative drag and lateral steering effects for intact and inflated tires, and for deflated tires with the tread belt in place. The sequence was repeated for tires with the tread belt detached. See also IRRD 899768. For the covering abstract of the conference see IRRD E201455.]]></description>
      <pubDate>Mon, 07 Feb 2000 00:00:00 GMT</pubDate>
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