Impact Tests of Full-Tempered Glass Windshield Panels

摘要

This report presents the results of impact and optical deviation tests carried out upon full-tempered glass panels of 1/4-inch, 1/2-inch, 3/4-inch, 1-inch, and 1 1/4-inch thicknesses nominally 1Z inches by 36 inches in size.nAn exponential relationship exists between the penetration velocity and the panel thickness. At impact velocities less than that required for failure, no effect upon the full-tempered pane was observed. At impact velocities which result in panel failure, the energy-absorption factor of the full-tempered glass was indicated to be relatively low. The penetration velocity of these panels is independent of panel temperature.nThe full-tempered glass panes showed excellent optical characteristics.nFrom weight consideration, the practical application of full-tempered glass panels for aircraft use appears to be limited to low-speed aircraft, windshield installations with a high angle of panel slope, and particularly for side- or corner-window installations of high slope.