Ah yes I remember, they use a modified NK-33/34 and once the stockpile runs out the Antares rocket has no obvious engine replacement. EDIT: I hope I don't soun

Ah yes I remember, they use a modified NK-33/34 and once the stockpile runs out the Antares rocket has no obvious engine replacement. EDIT: I hope I don't sound negative, I am probably too starry eyed for SpaceX and their merlin engines. I geek out how they built almost everything themselves.