Yesterday we tried completing this project but it was too windy and ended in injury (Cisco's fingers got in the gears, band aid followed). Today it was a little less windy so the boys were able to finish the testing which involved timing the lifting of the weight. So after a variety of blade positions and removing and adding blades....the most efficient windmill was discovered. And here are the results and some commentary!
The follow up activity was to make a top and use the weight and ratchet system to release the top.
Tuesday, December 2, 2008
Monday, December 1, 2008
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