Scale Model Engine with Water Well Pump

Giving your scale model engine a task can add new dimension to your display.

Water Well Pump

Builders of model hit-and-miss gasoline engines can add interest in the display by giving them a job.

Photo Courtesy Joe Tochtrop

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Builders of model hit-and-miss gasoline engines can add considerable interest in the display if the engine is given a job. The full-size engine was belted to some machine, so the scale model engine should be also. Water pumps and grain grinders were perhaps the two most common applications.

This is a model water well pump with jack that is an ideal companion for a scale model engine. The pump kit contains a fully dimensioned drawing and four unmachined gray iron castings: the 18-inch tall standard, the jack casting, pulley and cross head. Five finished steel gears (one is two-step) and the two unpainted wood pitmans are also included. The cylinder with piston will extend 4-1/8 inches below the baseline. With the addition of a bucket or trough and tubing connected to the cylinder, a most realistic pumping operation can be had. The 2-1/4-inch diameter pulley should be run at about 300 RPM. Gear reduction is 12:1. Mineral oil (or baby oil) should be used as the pumped liquid as this will lubricate the piston and not rust the iron.

Contact Joe M. Tochtrop, 2028 McAllister St., San Francisco, CA 94118 • (415) 346-6038