Hello Pierre:
It is truly interesting how far people will go in attempts to “rescue” the Savonius concept.
I just wish any of these sources could boil their reports down to something readable without taking the whole day. I mean, get to the point! I think they like to make their communications long and undecipherable in order to make it seem so complicated and confusing that people will just give up reading it and assume the “researchers” know what they are doing, and that somehow their results must be important.
“Professor Crackpot”? The third reference you supplied talks of TSR of between 4 and 5, for a Savonius(?). Did they misplace the decimal point? I’m just trying the even make any sense of it at all. How could a Savonius get above a TSR of about 1, and even at a TSR of 1, how could it be making much power, if any? Why can’t they just show a diagram and give the TSR and a power curve? What about including a few photos? One fact to note: They seem to be unable to get a Cp of much over 0.10. A better design might be possible, but likely with more moving parts, more to break, wear out, and go wrong… 