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A comment on SpaceX Has Pinpointed the Problem That Caused the Falcon9 to Crash Land. Parent comment

Re:SpaceX Has Pinpointed the Problem That Caused the Falcon9... by JshWright on Thursday January 15, 2015 @09:42PM (#8896986)
There weren't any 'early versions' of Grasshopper. Grasshopper was a single test vehicle (and it didn't use hypergolics, it just relied on gimbaling the single Merlin it had).

The first stage has cold-gas thrusters on board for attitude control, but has never used hypergolics, AFAIK. The only hypergolic engines SpaceX uses are the Draco and SuperDraco, which were never on any first stage cores.

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Re:SpaceX Has Pinpointed the Problem That Caused the Falcon9... by ChuckMcM on Thursday January 15, 2015 @10:46PM (#8897159)
You are correct, a long time ago when reading about the Draco I was under the impression they were used on the early Falcon 9 as thrusters, but according to this : http://www.spacex.com/news/2013/04/04/draco-thrusters they were only used on the upper stage and on the Dragon.
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Re:SpaceX Has Pinpointed the Problem That Caused the Falcon9... by StavrosK on Friday January 16, 2015 @06:31AM (#8898241)
Weird that I would look at the username for this single post out of the entire thread. You had me at "hypergolics".
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