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  • 1
    facet.materialart.
    Unknown
    Current Research in Aircraft Tire Design and Performance (1981)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A review of the tire research programs which address the various needs identified by landing gear designers and airplane users is presented. The experimental programs are designed to increase tire tread lifetimes, relate static and dynamic tire properties, establish the tire hydroplaning spin up speed, study gear response to tire failures, and define tire temperature profiles during taxi, braking, and cornering operations. The analytical programs are aimed at providing insights into the mechanisms of heat generation in rolling tires and developing the tools necessary to streamline the tire design process and to aid in the analysis of landing gear problems.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: The 1980 Aircraft Safety and Operating Probl., Pt. 2; p 543-553
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    A comparison of some static and dynamic mechanical properties of 18 x 5.5 and 49 x 17 type 7 aircraft tires as measured by three test facilities (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The properties were measured during static, slow rolling, and high-speed tests, and comparisons were made between data as acquired on indoor drum dynamometers and on an outdoor test track. In addition, mechanical properties were also obtained from scale model tires and compared with corresponding properties from full-size tires. While the tests covered a wide range of tire properties, results seem to indicate that speed effects are not large, scale models may be used for obtaining some but not all tire properties, and that predictive equations developed in NASA TR R-64 are still useful in estimating most mechanical properties.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA-CR-165720
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Heat generation in aircraft tires under free rolling conditions (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A method was developed for calculating the internal temperature distribution in an aircraft tire while free rolling under load. The method uses an approximate stress analysis of each point in the tire as it rolls through the contact patch, and from this stress change the mechanical work done on each volume element may be obtained and converted into a heat release rate through a knowledge of material characteristics. The tire cross-section is then considered as a body with internal heat generation, and the diffusion equation is solved numerically with appropriate boundary conditions of the wheel and runway surface. Comparison with data obtained with buried thermocouples in tires shows good agreement.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA-CR-3629 , NAS 1.26:3629
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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