Thruster

Thrusters move a ship. Each one pushes in the direction it points, and the ship’s speed and turning come from how many it has, how strong they are and where they sit: a thruster far from the ship’s centre of mass also turns it.

A thruster grows stronger with more thrusters in a line behind it, so a stack pushes far harder than the same number scattered about the hull. Boosting sends all of a ship’s power to its thrusters for a burst of speed, at the cost of its weapons for as long as it lasts. A firing thruster gives a stealthed ship away.