But Meanwhile, A different challenge had produced—with the tiles themselves. As flight profiles were refined and aero-loads better understood, engineers started to concern whether the tiles could endure the punishment. By mid-1979, it had become evident that in specified areas the tiles "didn't have sufficient strength to outlive the tensile https://www.facebook.com/permalink.php?story_fbid=pfbid0DiLutbK3L7Y5kHMEMTKXjro5bMS8pBfL6nFaExHXPc3UPsxhKHHbHHQPLS1Vo49nl&id=61562415773754&__cft__[0]=AZU0p5ioGU0P-5RWRZTVa14d9tp72x8Wl-e3BPMTY6p8eh0r2uJhkT9Pu8oDGt1Pcl71kyeUcOwfJxqJPz6hx7-8PIXGowNS0_Qpkw-2KlUiI-P-1l_wKxEKFP07LGrrmPqfO2EqHZYRbq2cGOhaLZZ1vSrdCK9NaMI-MgQ-QeBkrmItpRv7VVPwkXtjdnjQxxZtT1bC9SzNZpHCdFoDNSPe&__tn__=%2CO%2CP-R