Not sure if this will highjack the thread or not, but I think there is a strong enough relationship it will work.
It makes sense different weight classifications of CMPs would be geared differently in such a way as to make convoy movements of mixed vehicle fleets travel together at a consistent road speed.
Would you not also expect differing fuel consumption rates across the CMP weight classifications? If one did not also take that into consideration, planners would run the very real risk of vehicles running out of fuel randomly along the supply routes. It would be far better to ensure each differing weight classification carried enough fuel that all could expect attaining the same range when they all start out with full fuel tanks. Loaded weights and gear ratios would all play into fuel capacities, would they not?
David
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