Jeff, that is an interesting point that I hadn't thought to consider. I appreciate that you said it.

There was an interesting graph of the range of an M1 tank with and without an Auxiliary Power Unit. The increased range of an APU and perhaps also the more efficient turbine that was part of the Crusader program could have made a difference in rate of advance. The LV100-5 turbine gets 33% better mileage underway and features 50% reduced consumption at idle and has 43% fewer parts, a salient fact when one considers that something like 25% of the Army maintenance budget goes to service the Honeywell AGT 1500 turbine, per the Defense Science Board.