Comets give free ride.Sling shot the Sun you pick up great speed.Then a man made volcano with PFM t its core gives still more acceleration and direction at the captain's finger tips.The bigger the comet the better.It can give some gravity.Also my PFM will provide food,and all the electronics I have in the van.Comets are used for transpertation by by all aliens.It the only way to go in a round 11 mile spaceship.Bert Ps Best name it David he was big with a slingshot