On Tue, 1 Oct 2013, Rand Simberg wrote: > SpaceX is denying it, claiming that initial tracking data is always a > little flaky. And what could cause an explosion? It has no hypergolics > on it, AFAIK. Doesn't have to be hypergolics -- any form of stored energy will suffice. Something like an engine hard start is plausible, given that SpaceX has admitted that there was a problem with the restart experiment. There may be hypergolics in the RCS. An overpressurized tank can explode. So can a shorted battery (yes, battery explosions can be quite violent). Henry Spencer henry@xxxxxxxxxxxxxxx (hspencer@xxxxxxxxxxxxx) (regexpguy@xxxxxxxxx)