On Fri, Nov 22, 2013 at 1:05 PM, Ed Kelleher <Pres@xxxxxxxxxxxxxxxxxxxxx> wrote: > Has TEA/TEB ignition been used before on 2nd Stage? Seems most > upper stages are hypergolic, or augmented spark type ignition. > Apparently it hasn't been used much on American launchers. It's what was used on the second stage of the previous generation Falcon 9, per the spaceflightnow writeup here: http://spaceflightnow.com/falcon9/004/falcon9.html rst