Genuine question, how will tankers get into space? If most of the ship's size is already dedicated to fuel that's burnt, that seems to leave little left for fuel payload. I also assume fuel payload would be much heavier than other types of payload, requiring more ship fuel to launch it, further taking up space.
It seems like for every full refill you could provide in space it'd take an additional 3-4 ships just to get it up there?
It seems like for every full refill you could provide in space it'd take an additional 3-4 ships just to get it up there?