Let us not overthink the Plumbing.ORIGINAL: arvcran2
Combined weight, combined mass, ground friction/traction, and inertia would affect mobility, and fuel consumption as well.
Weight and mass of remaining fuel would directly impact performance and it is not necessarily a linear curve.
I suppose the remaining rounds would depend on the type of activity required to maintain contact. Retreating vs bunkered targets comes to mind for extremes.
Interesting thread.
Weight is already part of the fuel and movement speed formulas.
Traction or a equivalent is only considered for Airplanes, as they have to go the distance on a single fuel tank.
And the penalty for lacking fuel varries based on if you are the attacker or defender (less for defender) - same way Ammo consumption tends to be less for defenders.