The video I watched to make my first OTA coathanger antenna and gave me the idea for the foil antenna:
Coming soon: Computer controlled OTA antenna. It's mostly done, Just have not made time to finish it.
http://www.instructables.com/id/Computer-controlled-OTA-TV-antenna/ - still in progress..
Step 1: Improvement over an existing form.
Update: apparently the web site with original instructions is no longer available. I will update this instructable with all the details soon. For the mean time I have some quickie drawings. I think the long sections might have been 14 - 17 inches long. I will have to remeasure everything.