Liquid Rocket Engines (J-2X, RS-25, general)

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LEO Progress: J-2X to Test Stand A1 Jun 18, 2013 10:30:48 AM | William D. Greene
 
The chance to look for the effects of testing through detailed inspections away from the test stand is an opportunity to collect a great deal of useful information.
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LEO Progress: J-2X to Test Stand A1 Jun 18, 2013 09:40:02 AM | William D. Greene
 
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Welcome to the J-2X Doghouse: Twist and Shout...and Steering Mar 05, 2012 05:11:05 PM | William D. Greene
 
Put a little kid into the driver's seat of a car and what's the first thing they do? They grab the steering wheel and twist. Twisting the steering wheel back and forth is just about the most intuitive, intrinsic sense of "driving" I can imagine. Now think of a launch vehicle blasting off the pad. Other than for some extreme, emergency conditions, there is nothing that stands in for the steering wheel on a launch vehicle during ascent. Without a steering wheel, per se, how does steering happen?
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