6

No. Dragon V2 will likely be the first capsule with a built in "pusher" LES, an array of SuperDraco engines. The reason it has never been done is because the LES is usually considered dead weight once the craft has reached orbit. Jettisoning the LES as early as possible saves payload mass. The reason SpaceX and Dragon keep it is twofold. Falcon 9 v1.1 is ...


5

I can't find any performance specifications for Dream Chaser; apparently it uses its orbital maneuvering rockets for powered abort, which I would not expect to be very high acceleration. Body lift would maybe help pull it out of the booster's flight line? CST-100 is also hard to find specs for, but it looks like it's using 4 220kN RS-88 Bantam engines in ...


3

Looks like these are the first (according to http://www.newscientist.com/article/dn19239-whats-the-best-way-to-eject-astronauts-during-liftoff.html). I believe Elon indicated it had never been done before in his D2 reveal. Saying something has never been done before is a bit difficult to prove.


2

The proposed, but never completed and flown, Gemini B spacecraft might have used its solid-fuel retrorocket package, normally used for de-orbiting the spacecraft, for early launch aborts. The NASA Gemini flights launched on a Titan II, using only hypergolic liquid fuels, which can't explode quite as dramatically as non-hypergolics or solids, so ejection ...


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