This is the original pamphlet that was the inspiration for Dragonfly wind generators. First printed in 1935, reprinted 1939.Issued by the US gov. printing office, there's no copyright, so you may feel free to plagiarize anything it contains (like I did). However, if you don't want to spend a lot of time & money to develop a more updated design, please order a copy of the Dragonfly plans for $10. State-of-the-Art waits for no one though, so break a leg.
Some of Dragonflys' improvements are:
3 blades (2 blades will always vibrate at a given windspeed)
blade bearings
turntable brushes
higher output
vane follows wind better, doesn't wander
general sturdiness
cables replace hot wires for remote feathering control
You get extra points if you can decipher the instruction for blade design on pg 13. (lite reading for N. Dak. potato farmers in 1935)
Or you can get real with this blade design software for $5 from WindStuffNow.
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