How much leeway should I allow myself when calculating these. Is there a formula for calculating how much inertia to add due to outlying weight? When I calculate them as a rectangle I end up with smaller numbers than the RX car. And I am doing a 3,000lb truck. So obviously I am not doing it right. Should I just go by look and feel?
(Mass/12) x (Length2+Width2) I suppose I should double check, but this is the right calculation, right?