I’m not 100% sure about Windflow’s two blade turbine design – I have no reason to say that other than gut feel and aesthetics.
It is pleasing however to see that Windflow has signed a deal to sell some turbines to a Hawaiian windfarm. Selling just one or two turbines into a market is a smart way to do advanced product development specifically for a new market. It would be great to see Windflow crank it up and create scaled business from here in NZ.