H-rotor with (too large) savonius as start aid. Built in an outline frame.
The blades are 50cm long and 16cm wide at a turbine diameter of 90cm.
The flat side of the airfoils is inside.
It is driving a brushless direct current generator using a 72:12 (9:1) drive ratio.
Ball bearings are taken from inline skates.
Find out more about my projct (in german):
http://www.kleinwindanlagen.de/Forum/phpBB2/viewtopic.php?p=3367#3367
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