There are many types of wheels that harness the power of water. Each wheel is different and operates best in unique conditions. They vary in durability, cost, efficiency, and power output, among other things.
|The power of water|
|Outward-flow reaction wheel|
|Modern hydroelectric turbine|
Mills utilize the mechanical energy that waterwheels obtain from water. Depending on the type and size of the mill, the wheel used will vary.