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Forum:	Exploration: Asteroids, Moon and Mars
Topic:	[Discuss] NASA's Space Launch System development

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Your Reply: HTML is ON UBB Code is ON Smilies Legend	[QUOTE]Originally posted by Robert Pearlman: [B] [QUOTE]Originally posted by Spacefest: [b]The shuttle's first integration test was called STS-1 — and that was a pretty radical stack.[/b][/QUOTE] The shuttle's first integration tests took place in 1978 at the Marshall Space Flight Center. Enterprise was mated with an external tank and solid rocket boosters and subjected to a series of vertical ground vibration tests. <BLOCKQUOTE>[i]These tested the mated configuration's critical structural dynamic response modes, which were assessed against analytical math models used to design the various element interfaces.[/i]</BLOCKQUOTE> And keep in mind, while the shuttle was given the go in 1972, it didn't fly on STS-1 until 1981 — a development period of nine years. Beyond integrating existing SLS systems and hardware, the upper stage J2X engine has just begun its first series of test fires, the five segment solid rocket motor has only been fired three times, the launch escape system has only been test fired once, and the first space-worthy MPCV has just begun construction. [/B][/QUOTE]
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