The 55khp is for each fuel pump; the first stage needed just short of 300khp just to bring fuel from storage to the five combustion chambers. (Probably not the

The 55khp is for each fuel pump; the first stage needed just short of 300khp just to bring fuel from storage to the five combustion chambers. (Probably not the correct term) Edit: ninja'd by eventualhorizon, whose comment is way more informative than mine!