Word: liftings
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Dates: during 1980-1989
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...lines connected the fuels to the orbiter, where they would be mixed at controlled levels to power the spacecraft's engines. The other two companions were the gleaming white boosters, each 149 ft. tall and packed with more than 1.1 million lbs. of solid fuel. Once ignited at lift-off, they would burn uncontrollably until their fuel was spent...
...launch platform was about to be flooded by powerful streams of water gushing from six pipes fully 7 ft. in diameter. The purpose: to damp the lift- off sound levels from Challenger's three engines. Otherwise, the acoustic energy alone could damage the craft's underside. The main-engine firing sequence was turned over to computers...
Even then the onboard computer, sensing the slightest glitch, could still abort a launch. As it happened, Resnik had been aboard the shuttle Discovery in June 1984 when, four seconds before the spacecraft's three main engines were to ignite for lift-off, the computer noted that the thrust from one of them was not at the proper level. The fuse was immediately pinched...
...Four ... three ... two ... one ... And lift-off. Lift-off of the 25th space shuttle mission. And it has cleared the tower...
McAuliffe's mother and father had watched anxiously at the long-awaited lift-off. They appeared more somber than many of the cheering spectators. Ed Corrigan seemed to sense the tragedy first. He reached out to put an arm around his wife. Grace Corrigan's look of puzzlement turned to tears. She cradled her head against her husband's shoulder. Most of the schoolchildren were mystified. But some began sobbing as they saw the reaction of the adults. To those in the stands came a brusque order: "Everybody back on the buses." The lift-off celebration at McAuliffe's high...