OK here is what was done and the results:
the two independent FWD and RWD systems,
both front and rear drive systems were charged 100% , drove about 15 min = to 2hours with larger batt. then switched to rear drive system, it was charging the front system, after 12 min = to 1.5 hours the front system would only charge to about 80% ,,stayed at 80% to 15 min = to 2hours of driving, still only at 80%charged, switched back to the front system. now after almost 15 min= to 2hours of driving again the charging of the rear system was only charged to about 50%, after equal to 400 miles the two systems were at 20 to 25% charged,,, sorry it didn't work as a 100% electric car, but with a small 5 hp gas engine to run a maybe 20 watt generator to top off what the charging system would not complete this could be a 200 mpg hybird.
now you know what i know. LOL. jim
note we did run the rc car for just over an hour, was told that is = to 6 hours of operation . I am getting there.