Koyaanisqatsi
Jul. 28th, 2005 11:37 amThe -qatsi trilogy's website has a discussion forum, and obviously one of the things that's come up - repeatedly - is the identity of the abortive launch at the end. The number of people asking whether it was Challenger - in spite of the facts that a) it's obviously not a shuttle launch because there's no bloody shuttle, and b) the film was released years too early - is quite astonishing. However, for future reference the question is answered plausibly here, with information allegedly taken from http://www76.pair.com/tjohnson/aclv3c.html (a page which seems not to be available) :
The first Atlas Centaur, denoted "C-1", was erected on the new Launch Complex 36A at Cape Canaveral during the spring of 1961. It stood there for 15 months before finally lifting off on 1962 May 8. The vehicle rose cleanly and steered downrange, but 49 seconds after liftoff a portion of one of four Centaur LH2 tank "weather shield" insulating panels ripped away. The LH2 fuel tank quickly overheated, overpressurized, and failed. Centaur shredded, causing the vehicle to explode 55 seconds after liftoff.
Centaur's fiberglass foam core weather shield panels were designed to keep the LH2 fuel cool until Atlas fell away and Centaur's RL10 engines ignited. Then the panels were to be jettisoned to save weight. The shields were hinged at the bottom and held in place at the top by spring loaded tension straps and explosive bolts. The design turned out to be structurally inadequate, however. During the C-1 flight, a shock wave at the base of the nose cone impinged on the panels, causing negative pressure that dislodged the strap.
So there you have it. Apparently February is Spring in Florida.
I should probably watch the scene again after looking at loads of pictures of Atlas rockets, just to be sure, but it looks plausible from the ones I've just seen.
The first Atlas Centaur, denoted "C-1", was erected on the new Launch Complex 36A at Cape Canaveral during the spring of 1961. It stood there for 15 months before finally lifting off on 1962 May 8. The vehicle rose cleanly and steered downrange, but 49 seconds after liftoff a portion of one of four Centaur LH2 tank "weather shield" insulating panels ripped away. The LH2 fuel tank quickly overheated, overpressurized, and failed. Centaur shredded, causing the vehicle to explode 55 seconds after liftoff.
Centaur's fiberglass foam core weather shield panels were designed to keep the LH2 fuel cool until Atlas fell away and Centaur's RL10 engines ignited. Then the panels were to be jettisoned to save weight. The shields were hinged at the bottom and held in place at the top by spring loaded tension straps and explosive bolts. The design turned out to be structurally inadequate, however. During the C-1 flight, a shock wave at the base of the nose cone impinged on the panels, causing negative pressure that dislodged the strap.
So there you have it. Apparently February is Spring in Florida.
I should probably watch the scene again after looking at loads of pictures of Atlas rockets, just to be sure, but it looks plausible from the ones I've just seen.
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