I decided to try a wooden 2 foot dia 3 blade TSR of 5-ish.
Using the common free download design programs I seem to have found a bug in all of them I tried.
Anything under 1 meter throws them for a loop. As the blade gets smaller, things get farther off. Things like a 0.2 meter blade making 525 watts in a 10MPH wind, or a 0.3 meter getting 1900% efficiency at 10MPH.
The designed blade each program shows seems quite different than any of the other programs.
I honestly don't know enough to know which is close and which is way off. I do know 0.2m in 10MPH will not get 525W. I also know I, personally, can not carve a blade with the last 2 stations 1mm or less thick.
Any suggestions? I'm not concerned with the watts (it illustrates the bug), just the blades.
Thanks,
G-