But in the meantime, Yet another dilemma had developed—with the tiles them selves. As flight profiles ended up refined and aero-loads improved understood, engineers started to concern if the tiles could survive the punishment. By mid-1979, it had become clear that in particular parts the tiles "didn't have enough strength https://www.facebook.com/permalink.php?story_fbid=pfbid0pJKGgRvVTsfTCtJ5tak6SUJ5ymgDetxzjcgW6kEiTpAqgHasCi2doykziDdLBxVBl&id=61562415773754&__cft__[0]=AZV964PfkhTubvAMf2bTV1XhNBUUD2Vg-F7bLhy7GWl7zj1onQbBObHNkuvws4QUTstxSG8tJHvPu2i75NOHj9zgd4OHn0QvWLuR3-J-NN5qO5GluG5mTMBNXNvy_sY_CHjeRzSU_LGsDLKF1cvaLTMLq1lm8qe6o41LucAUqCX9nVZpW4UxcRu-y78djF1vwg_u3f2vPQpMFB3Au-4_Ovry&__tn__=%2CO%2CP-R