Thanks for the reply.
70km/s is a lot faster than any of our exploratory spacecraft . I guess only a deep space mission requires massive velocity. (edit: just read that Juno will be setting new record achieving 150,000mph on its mission)
Im struggling to get my head around the spacecraft...
Basicaly wanting to know the maximum velocity achievable if we sent out a craft purely to go as fast as poss using gravity assist + initial escape burn. Obviously a time limit would be needed so let's say 10years of gravity assist manouveres.
How fast could we go? Would the gforces involved...