Pretty clearly the longitudinal wind would be more than canceled out by drag. You might be able to get some net power from any cross-wind that is present. But for that, you're better off with fixed windmills used to charge your battery.
I saw a paper that suggested that for big non-aerodynamic trucks you could put a big fan on their back and power it with the fuel and save something like 20% on fuel.
This thread is intended to provide a space for 'crazy' ideas. Ideas that spontaneously come to mind (and feel great), ideas you long wanted to tell but never found the place and time for and also for ideas you think should be obvious and simple - but nobody ever mentions them.
This thread itself is such an idea. Or rather the tangent of such an idea which I post below as a seed for this thread.
Rules for this thread:
If this should become a regular thread I suggest the following :