Clockwork engine

   

1   The train body is 3 7/8" -  9.95cm long. 

The large wheel has the clock spring behind it.  

 The spring wheel cogs drive the middle wheel.

The wooden circles show where.

The Different Types of Train Wheels

The three types of wheels: The first thing to recognise is that steam locomotives have three basic types of wheels; Leading Wheels, Driving Wheels and Trailing Wheels. All locomotives have Driving Wheels but not all have leading or trailing wheels.  

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