Abstract
A series of experiment has been carried out to measure the effectiveness of the new rotor blades of waterwheel in order to absorb as much as possible the energy of flow water. The scoopy blade is predicted convert more effectively and efficiently the water energy into useful mechanical energy compared to flat blade. This blade is intended to used for undershot waterwheels operated in low current rivers in Indonesia. The scoop blades are tested at a flow range from 0.8 m / sec - 2.5 m / sec in the range of gamma angle 100, 150 and 200. All results are compared to the flat blade where gamma angle is zero. The test results show the scoopy blade with gamma angle 100 is effectively harnessed the water energy compared to others. The blades with gamma angle 100 produce bigger power and bigger efficiency than blades of other gamma angles.
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