Impellers are the primary rotating component of a centrifugal pump or turbine, usually made of iron, steel, bronze, brass, aluminium or plastic, which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation. The velocity achieved by the impeller transfers into pressure when the outward movement of the fluid is confined by the pump casing. Impellers are usually short cylinders with an open inlet (called an eye) to accept incoming fluid, vanes to push the fluid radially, and a splined, keyed or threaded bore to accept a drive-shaft.
15-ton cast iron turbine components don't grow on trees! This beacon is too good to abandon - the hide is similar to the last cache here. You seek a magnetic container - BYOP. Please rehide carefully, then enjoy a nice view of the Mississippi River with Lock & Dam No. 1. Registered with St. Paul Parks and Rec Department.