4: Carbon wipers on the wheels of a Bachmann 1:24
passenger combine
If you apply force against one side of one axle and the other
side of a different axle, the wheels will tend to track poorly and
may become a running nightmare.
Unless the car you are converting already has trucks with
power pick-ups, your first task will be to add them. So, let’s talk
about that process.
Copper doesn’t make for good power wipers. Why not? While
it is very conductive, it is soft and hard to keep in good contact
with rotating wheels. I prefer a spring alloy of copper and
beryllium. Tichy Train Group sells it in wire with sizes from 0.01
inches to 0.032 inches. It is also sometimes available in sheets.
If not beryllium copper (BeCu), then I like stainless steel.
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