Sorta is a city thas is looking for a planet. So most of the time the citie is floating, but when they find something spacial, they turn on the flames and start flying. Think about a ship in the ocen whit no fuel, and it is looking for land, part of the time this ship only floats in the sea becose the capitan doesnt want to waste the fuel, but finaly he could sea a land, the he turn on the engine and raise the speed to reach the only hope he has seen in many months.
This idea is the same, only I havent make an sckech with all the elements together.
Thank for the advice.
Snake Farlow. The rogue.