Tread and brownouts

[mrnoble]

We are discovering that tank tread leads to significant systemic friction issues; not with the floor, but within the system. 12.3V batteries dip to 10V when the treads are free spinning, and down into brownout zone when on the floor and mildly pushing. Anyone else experienced this? What steps have you taken to alleviate the problem? We are currently working through the system (including gearboxes, which in our case are two sets of single reduction clamping boxes, 14:70 reduction, with the 70's meshing the two CIMs per side).