I recalled a person over on 'Picoturbine' making a Savonius vawt using a 'CD' to mount the blades...so as I was shopping I see this sign 'Free Take One' so everytime I started collecting 'FTO'-CD's. Some foam plastic cups, a pointed 1/4 inch wood dowel, 'super glue' and some of these CD's .....I ('got optimised' ??) like this:
So I took it outside hardly a bit of wind just a light breeze that you can just barely feel on your face...not even enough to turn the little pinwheel(which gives me another idea for a wind speed thing).Well anyway this foam cup thing is turning about 30 rpm even in this light breeze.
So I'm wondering ....what's the lightest wind anyone out there has ever had that makes some power, even if it takes a slight gust of wind to get it over the cogging. Curious and seriously...would like to hear your stories about success in light winds....as there are a few of us, is mostly all we've got. Jerry gave me an inkling of some sucess in light winds...anyone else? ( :>) Norm.