I've heard a lot of people talk about solar sails versus things like Ion thrusters, and it seems that both have their advantages and disadvantages. So I was wondering whether or not it's possible to use both on a single spacecraft? That way you could get the speed of an ion thruster along with that constant push of the solar sail... Is this possible? I guess what I'm thinking is something like one of those sail boats on earth that also has a few engines on board. I know this is a completely different animal, but that's the same general idea, I think. I don't sail, so I'm not sure.