O Ring Seal Challenger

Making challenger made watching the spacex launch earlier this year a.

O ring seal challenger.

The rubber o rings of which there were a primary and secondary between each rocket segment weren t supposed to be burned by the gases resulting from liftoff but that s exactly what happened during the testing phase. This was famously demonstrated on television by caltech physics professor richard feynman when he placed a small o ring into ice cold water and subsequently showed its loss of flexibility before an investigative. Report of the presidential commission on the space shuttle challenger accident 6 june 1986 volume 1 page 145 link color added. The crew members cabin remained in tact but fell to the atlantic ocean at approximately 200 miles per hour.

The failure of an o ring seal was determined to be the cause of the space shuttle challenger disaster on january 28 1986. The challenger itself didn t technically explode but rather disintegrated from the result of the o ring malfunction. Challenger was destroyed due to a faulty o ring seal in one of its booster rockets allowing burning gas to escape. The following months were anything but easy for mcdonald.

An o ring seal had failed at launch but the hole was quickly resealed by aluminum oxides before any flames could escape and cause an explosion. On the morning of the launch the cold rubber became stiff. The o rings were never tested in extreme cold. The primary o ring of the left nozzle had been eroded so extensively that it had failed to seal and for the first time hot gases had eroded the secondary o ring.

Strong wind shear that began 37 seconds into flight then tore the seal back open resulting in the catastrophic breakup. Commander dick scobee pilot mike smith. Worries of potential o ring failure in the near freezing weather conditions predicted for the following morning as expressed by roger boisjoly and others were downplayed and thiokol collectively voted that challenger was fit to fly unwittingly signing the death warrants of the seven member 51l crew. Field joints containing rubber o ring seals were installed between each fuel segment.

Months after the disaster the cause was revealed. Joint temperature incidents when o rings failed source. Perhaps most concerning was the launch of sts 51 b in april 1985 flown by challenger in which the worst o ring damage to date was discovered in post flight analysis. Morton thiokol discovered that both o rings booster sealers had malfunctioned which led to the fuel tank blowing up.