The overshot wheel (Fig. 168) is harder to make, but is a livelier wheel.
Why are undershot wheels less efficient than the overshot wheel or turbine?
The overshot wheel used in the former connection is a monster in size, being forty-six feet in diameter.
All the figures were moved by a wooden engine, which was run by sand falling on an overshot wheel.
In the overshot wheel (Fig. 84) the power depends on the weight of the water and on its height.
It was run by water brought from McKusick creek, the motive power being an overshot wheel forty-five feet in diameter.
The generatrix had to make 1,500 revolutions, and be set in motion by an overshot wheel.
We can let the water fall into the buckets of an overshot wheel.
The motive power is an overshot wheel, propelled by water from two large springs.
Where sufficient fall is available—at least three feet—the overshot wheel is used.