Scale Model Engine with Water Well Pump

By Staff
article image
Photo Courtesy Joe Tochtrop
Builders of model hit-and-miss gasoline engines can add interest in the display by giving them a job.

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

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