Rich Thomas wrote: > > As far as working supersonic propellers, that has been researched quite > a bit, but the noise is the big issue. They can be made to work with > the right geometries, and pretty well, but quite noisy.
I've been thinking about making a vertical axis windmill, with fiberglass cloth over foam wings. I'm thinking I want to keep the speed under 800fps to avoid supersonic airflow, but 600-700fps might be better in practice. With a 60 foot circumference, you could do ten rps (600 rpm) and still have only a 600fps wing speed. Mitch. _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
