Wood has some good properties like light, strong and not sensible to fatigue. But it also has some bad properties like that it is difficult to find wood with a constant quality, grain and density. Protection against penetration of water requires several layers of epoxy and the epoxy has to be protected against ultra violet light. Because of difference in density, a wooden rotor always has to be balanced and after balancing the correct blade has to be mounted at the correct place on the hub. The airfoil nose can also been damaged by hail and the thin airfoil tailing edge can easily been damaged during transport.
Wooden blades can be made tapered or with a constant chord. I use constant chord blades in alsmost all VIRYA wind turbines. Constant chord blades are much simpler to manufacture and use much less material. The maximum Cp is only a little lower than for tapered blades. But to give the blades enough strenght and stiffness, they should be not too slender. A problem with supplying only blades is that you don't know what safety system will be used by the buyer. If they use no safety system at all, slender wooden blades will be destroyed at very high wind speeds because of flutter. This can give you a lot of claims even if it is not your fault.
If you think about serial manufacture, stainless steel tapered blades are also an option as making the tools to camber and cut the blades is worth while if you make more than two or three blades. My public reports KD 616, KD 617, KD 656 and KD 733 describe such rotors with different diameters and number of blades. These reports can be copied for free from my website:
https://www.kdwindturbines.nl at the menu KD-reports. You should study at least reports KD 35, KD 196 and KD 485 if you want to become a professional manufacturer of rotor blades.
Another product you may think of is to suply a PM-generator which has been measured such that the characteristics can be used for a wind turbine rotor. Different options for PM-generators are given in my report KD 341. I think that the generator as described in report KD 718 is the most competitive. Measured characteristics are given in reports KD 78, KD 200 and KD 595. But you have to compete with cheap Chinese generators. You will only win if you make excellent quality and if you supply correctly measured characteristics.
