ION Drives are relatively new technologys, and have been used for small un-manned missions to comets and stuff, however, there incredibly weak (0.2N thrust from what i have read). Does this teachnology have the potential to accelerate something like a 5 tonne manned ship at 10m/s ? I have done the mechanics of it, it would need to be about 500 000 times more powerful than it currently is to pull off such a feat! Are the current drives crude designs? I dont know how NASA and such work you see! when i build something (say a website). I just build it to work, then pile everything else that needed, like design and usability on top of that! Do NASA work like this, thus the technology should become alot more powerful in the future ? Thanks!