[jolhoeft]

I actually did this a lot when I was designing electric motors. One detail the original article didn't note, is the 39th root of 92 is very close to the 6th root of 2, off by half a percent. This makes scaling for voltage changes simple. Going from US 120V to European 240V? Go up three wire gauges and double the number of turn.

In practice, it was not quite that simple, because of the half percent error, and wire insulation doesn't follow the same scaling pattern, but it was still quite handy, and much less trouble than metric, where you constantly had to dig out the wire gauge chart.