If I have a drive that works in space without the need of any out side contact. In other words there is no equal and opposite force. How many pounds of force would I need to move a 40 billion ton rock to a speed of one mile an hour? If there is a program to work it out that would be great as well. Also what would be the best high temp and high strain insulators? I would like something what would work with molten copper or aluminum.