Windy September 20, 2013 A turnstile project might be modified to make an anemometer
for Jr.FLL 2013. http://netapps.marshall.edu/lego/lessonplans/Turnstile/Turnstile.html This gear project is from lesson 20 in the simple machine sets.
It can also be done with different sets and different gears.
What does a pawl and ratchet do?
Put wheels on the ends
to cup the wind.
Windy