Well, I don't know if it'll kill you, but it will add aerodynamic drag, and possibly not work at all depending on the amount of force necessary to crank it at such a rate as to provide adequate power. Perhaps if it flew off and smashed through the windshield.
As for solar panels, I think the consensus is that it either won't provide enough power or isn't very high on the ROI scale (return on investment). Unless you can get some great solar panels for free or cheaper, and if that's the case please pass on the contact info!
__________________
|