For the usage I had in mind (when I posted my "crazy thought"), the goal would not be to get "MPG Champion-level" FE, but rather to be able to cover long distances (obviously exceeding the range of the EV itself) while still getting "better than average" FE. The idea being that once at the destination, the pusher is parked and the pure EV can be used for local travel (and can be recharged using local resources). In my case, I typically travel to parents about 1000 miles away once a year, so I can relate to this kind of scenario.
Probably using regen to recharge the batteries "in-flight" is a lot less complicated than doing the "larger alternator" etc. Especially if that's already an existing feature of the EV.
I also realize that simply buying something like the Volt which accomplishes essentially the same thing would be a lot simpler too... just that the thought of a brilliantly executed DIY solution which outperforms anything available commercially is rather appealing...
