Ever look at the crank up mechanism from an RV off-air antenna?
The big question is would you realize enough gain from being able to tilt as opposed to not tilting? Rather than tilting, perhaps just adding an extra panel or read up on Handy Bob Solar
. A tilted solar panel makes a nice windcatcher and could go sailing off the roof (not that the one I saw actually left the roof... just blew around punching holes).