public Collection<Force> getForces() {
List<Force> list = new ArrayList<Force>();
Vector2d force = new Vector2d(0.0, -20000.0);
force.scale(getForeStarboardEngineThrottle());
list.add(new Force(new Vector2d(13.0, 0.0), force));
force = new Vector2d(0.0, 20000.0);
force.scale(getForePortEngineThrottle());
list.add(new Force(new Vector2d(13.0, 0.0), force));
force = new Vector2d(-14000.0, -14000.0);
force.scale(getAftStarboardEngineThrottle());
list.add(new Force(new Vector2d(-7.0, 5.0), force));
force = new Vector2d(-14000.0, 14000.0);
force.scale(getAftPortEngineThrottle());
list.add(new Force(new Vector2d(-7.0, -5.0), force));
return list;
}