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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
by JshWright 12y ago
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.
- ChuckMcM 12y agoYou 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 http://www.spacex.com/news/2013/04/04/draco-thrusters they were only used on the upper stage and on the Dragon.
- StavrosK 12y agoWeird that I would look at the username for this single post out of the entire thread. You had me at "hypergolics".