Some experiences last days, using the same 0.52 m x 0.3 m VAWT. The VAWT power is used to spin the 0.2 m diameter bottle(s) which replace Sharp rotors.
Bottle kite:
Rpm 500 in the first part of the video, rpm 1000 near the end, wind speed 8-14 m/s:
Double bottle kite:
Rpm 350, wind speed 10-16 m/s:
