That seal helps to prevent liquids or gases from escaping The morning of the 1986 space flight was much colder than previous Challenger launches, and the primary Oring became cold and hard and HydraPak was the sole contractor NASA used in the manufacture of the space shuttle Orings On the morning of , NASA decided to go ahead with the launch of the Challenger despite10 Experiments indicate that the primary mechanism that actuates Oring sealing is the application of gas pressure to the upstream (highpressure) side of the Oring as it sits in its groove or channel a For this pressure actuation to work most effectively, a space between the Oring and its upstream channel wall should exist during
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