Suppose the pod is at 1000,1000 (x, y), the speed is 1,0 (vx, vy) and you want to go to 2000,1000 with thrust 100.
At end of the turn you have:
Pod at 1101,1000 ( 1000 + 1 + 100) (only horizontal move, because angle is 0)
Speed = 85,0 ( 1+100 = 101 -> 101 * 0,85 = 85 (trunc) )
0,85 is the "drag coefficient" after each turn.