The rotational radius has to be pretty large to be practical, but the spaceship itself doesn't need to be particularly large. This is because you can attach to

The rotational radius has to be pretty large to be practical, but the spaceship itself doesn't need to be particularly large. This is because you can attach to a counterweight with a cable and spin the whole system about a point somewhere along the cable. So you're really only restricted by how long you can practically make the cable.