[falconmaster]

Originally Posted by GUI

Today we put some 6-4 model airplane props that we had lying around on it to see how they compare, and it's quite a difference. The bot was quite a bit faster, though they were spinning noticeably slower than the fan blades, indicating higher motor loads. I think with with some sort of Kort nozzle (we need prop guards anyway, why not make them aid propulsion?) these propellers will do what we need. We are planning on testing with larger fan blades and possibly with cut down airplane props.

EDIT: Here's a video of the teste with the airplane props ( the vertical thruster is still using a fan blade in the video) http://youtube.com/watch?v=DeYNCOiSV4Q

Awesome guys! We see that same thing about the plane props. We have used three bladed reverse pitch 12 inch props that we cut down to 4 inches inside a abs coupler as a shroud. The girls team LEGIT is using this idea
http://legitrobotics.googlepages.com/frame2