Recent content by Swedpat

Pedalled drived airplanes have a 2-bladed propeller of around 3m diameter, so I understand that the most efficient is to have a large propeller which is rotating not much faster than the vehicle. About the air and rolling resistance I think I read that a racing bike has not much more rolling...

Thanks for your reply vissarion.eu! Interesting things you share, though it may be a bit over my physical knowledge to count out these details. But according to what you say and the values you show the efficiency of a propeller is very depending of the right size and pitch for the intended...

Hi everybody! I am new here and found this thread when I seaked for propeller efficiency at Google. Since many years I have been fascinated of the propeller and more than 20 years ago I got the "crazy idéa" of making a pedal bike with a propeller. (I have still not made it) I have read a lot...