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Old January 8th 07, 01:38 AM posted to rec.aviation.piloting,sci.space.history,sci.space.shuttle
Kyle Boatright
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Posts: 578
Default Why does the shuttle throttle on ascent?


"Henry Spencer" wrote in message
...

interesting stuff snipped

That said, the SSMEs are cranky, marginal engines, and taking *them* up to
120% (as was once intended) is much more iffy than doing the same for
robust engines like the H-1 or F-1.
--
spsystems.net is temporarily off the air; | Henry Spencer
mail to henry at zoo.utoronto.ca instead. |


Henry,

What makes the SS engines "cranky and marginal" vs the H-1 and/or F-1?

Thanks...

KB