Parametric US Army WW2 7.5x20 Wheel Rim

An OpenSCAD model of a US Army World War 2 7.5x20 wheel rim. Used on 2 1/2 ton trucks and water trailers.

The default scale is 1/72. Setting the ScaleFactor variable to another scale is all that's needed to generate a given scale:

ScaleFactor72 = 0.0138;
ScaleFactor48 = 0.02083;
ScaleFactor35 = 0.02857;

ScaleFactor = ScaleFactor72;