Simple Home Built Waterwheel | Otherpower
The turbine was made from a junk squirrel cage fan. The fan housing was bolted to the tree, so that the water poured into the "output" of the fan, and came out a hole which was cut in the bottom of the fan housing, making for an "undershot" waterwheel. ... The gear ratio is 1:3 the generator turning 3 times faster than the water wheel. They ...