Originally Posted by
skadi
Most of the clouds are just formed by condensation of the ambient air humidity
Fair point. It's still (necessarily) venting a lot of propellant though, and you wouldn't want them mixing in anything even vaguely approaching a stoichiometric ratio.
Originally Posted by
ORAC
RUD at 1/4 speed…
That's interesting; looks like it might have started in the region of the intertank.