Originally Posted by

**thekillman**
What? no of course not. If you have a free body sphere then you apply a force tangential to the surface, the sphere will start to spin.

original impulse equation:

F*dt = M*dV (F= force, dt=change in time, M is mass, dV is change in velocity)

Since we have a moment not a force, both sides are multiplied by radius r. this gives:

(F*r)*dt=M*dw. (impulse equation where F*R is the moment applied (force times radius) dt is the period of time it is applied, M is mass and dw is change in rotation speed (yes the w should be an omega)).

Apply such a force to the body for a very short time. it starts to rotate at a certain speed. once you are at the angle you need to be, apply a force in the exact opposite direction. Since Atlantis has engines on one side, it means firing the thruster 180 degrees from the original thruster, for exactly the same time. The city no longer rotates and has changed it's angle. Fire all thrusters and the city moves in a direction without rotation.

Space is pure dynamics, no aerodynamics are required.