Don\'t bother posting this, there was a lot of suggestions on forum about this. This should be easy to implement thou, if you keep in mind that some kind of mechanics like that is already in the game (admin command /change_sector). If it also will depend of power (and show us how much power we will need to jump like 10km away) we have on our ship, and completely disable shields after jump, this could be good enough and balanced.
So, schema, can we have jump drives now? xD