There is only one possible conclusion..
...Golf carts should have sails!!
Seriously though...I do think that eventually regen can get practical (my "X-prize" standard is 10:1 ratio). But you probably need some combination of (as mentioned many times)
o fancy controller to auto-feather without stalling
o Optimized prop design that can generate lift in reverse
o Over-sized (and therefore probably pod-mounted) and maybe shrouded/ducted props - note: these need to be running all the time while sailing or the drag would be too great, so technically you're now a powerboat.
That's why I call it a science experiment - if you've got more money and time than common sense you'll be a perfect candidate!!
But consider - if this really worked there would already be a tow-generator on the market that would make stupendous claims about how much power they generate (in reality a good one gives 6-8amps @12V - about 100watts*...
-Keith
(* references: http://www.jgtech.
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