Nathan, I do not know of one, there are too many variables, however as I fly a 3m (10') duel rotor I will supply my figures.
Now my wind speed measuring is only at 6m (20'), this turbine is at 60', but due to the tower being slightly down hill it is equal to half height, oh yes depending on wind direction, bugger another variable, oh and my system is 24V.
So design calculations were 10A @ 203 Rpm @ 4,5 M/s.
- A @ 230 RPM @ 5.2 m/s
- A @ 244 RPM @ 5.5 m/s
- A @ 264 RPM @ 6m/s
Now to date I have seen 50 amps give or take (1.25Kw). Wind speed is very variable so it is dificult to assign a wind speed to output, but suffice to say estimates were possibly on the mark or slightly under for given output.
Now commercial units come with power curve, I do not know how they are derived, perhaps a wind tunnel.
I don't know if any of this helps, but for what it's worth.
allan down under