Ghurd,
I was looking over the sketches from the Back Shed. Overall there very good, and convey the concept. There are a couple things I'll comment on though:
The note says that, "The insert picture is what you would see if you looked directly at the turbine" Directly in this case means perpendicular to the plane of the blades; changing you view point as the thing furls. Viewed from upwind, however, the wind-swept area changes from a circle to an increasingly smaller oval - which is why it works so well. This would probably be an improvement to the insets.
It also says, "the tail will always point down wind". While mostly true, initially the wind creates thrust which the weight of the tail is resisting. Until gravity is overcome (and the force inherently keeping the tail in the wind stream), I believe there is a slight skew opposite this moment arm.
Lastly, the description expalains that furling is an effective method of making the turbine "safe", but goes on to say, "it provides output power regulation." I don't think the latter is accurate. Without battery regulation, diversion, or at least manual control of loads, the batteries still will overcharge and be damaged.
I know I'm not telling you anything new, but I thought it was worth mentioning for others who might get the wrong idea.
~kitestrings
