@GtE: thanks, there had to be a flaw somewhere. Still, if only 20% is required of what I calculated, it still takes a 200kW power source to recharge in 6 minutes - only slightly less unrealistic. And @abgb, "only" a 17kW power supply? How many m2 of solar panels does that take? Or a 40+ amp cable from a 400V outlet? Or would you produce those 17kW from a diesel generator
? And mind you, that is only for one aircraft. If, on a sunny weekend day, your field wants four planes in the training circuit than you'll need four of those 17 kW power sources, too.
On a more general note, I agree that the evolution is not to be reversed - but I remain highly cautious, there's too many tell-tales around, and the technology does need time to ripen.