Just wondering. Looking at the stage 2 onboard camera footage: it showed a
wet non-luminous exhaust as if it were water vapor. Does that imply unburnt
RP-1 surplus (fuel rich) of the stage 1 exhaust would *not* be luminous in
the vacuum of space like in part of the return trajectory? Not clear to me.
Unless stage 2 combustion was not as fuel rich as stage 1 is the reason.
Anybody?
John
