Nice intro to model airplane propellers

If you want to start taking your robots into the sky, you should watch this video.

http://makezine.com/video/maker-hangar-episode-2-propellers/?utm_source=feedburner&utm_medium=%24%7Bfeed%7D&utm_campaign=Feed%3A+%24%7Bmakezineonline%7D+%28%24%7BMAKE%7D%29&utm_content=%24%7BGoogleReader%7D