Hey TomW,
This particular step-kid has money to burn.
Her "mother's" checking account is apparently bottomless. Step-dad will work 32 hours a day to replenish it. The money spent on her college education doesn't count. Her bio-dad's $5/day support really helped, before she turned 18 and before she started college. He plans on suppling a little money during her college.
Ha-Ha! I crack myself up.
Maybe that's just how it looks from here.
I spend much time each day sitting, planning, and looking at the bottles on the bathtub. Nuff said about that situation.
I figure to split the difference on the gap (top/bottom) difference.
Something like the spiral / helical VAWT designs. Too much something in one place evens out too little of it in another place.
Too narrow at the top means too wide at the bottom? Self balancing?
Ed's minigen might be perfect for this? Low power, low RPM, but needs torque to get it going.
Not sure the educational turbine kits will get enough RPMs with this kind of blade.
Everybody should study those bottles on the bathtub tomorrow morning, shortly after the second cup of coffee.
G-