[biblewonk]

I am very happy to hear that you are in favor of wind power. I wish I lived near some windmills.

The thing about the blade speed is that the tip speed is about 200 mph. From way back they seem slow but if you are a bird, with a tiny little brain, you will make mistakes. Kinda like humans and cars.

There are solutions though. Larger windmills on taller towers that are tubular and not lattice helps quite a bit.

[clamper1797]

Well ... I can see the windmills now ... I've actually lived here for ten years and have seen each type that are used here up close. The big ones have blades about ten foot long ... given the equation for circumference C = pi · D that means that the C = 31.4 feet. Though the big ones take over 2 seconds to go around (I can time it from where I sit) for arguments sake I'll say it takes one second per revolution or 60 RPM. 31.4 feet per second or 1884 feet per minute (31.4 FEET X 60) or 113040 feet per hour (31.4 feet x 3600). There are 5280 feet in a mile so that makes or 21.4 mph ... thats a long way from 200mph. Even if my math is flawed ... I can see the blade tips from here ... there is NO WAY that they are moving 200 mph. At 200 MPH the prop would have to spin at a little less than 600 RPM