Here is a Union Pacific Diesel engine I've used as a concept vehicle for testing new design techniques. This model includes working cab lights, working tail lights, working headlights, a working 4-cylinder engine, and rotating fans on the top.
(click images for a larger view)
|An overall view. Not the reflection of the tail lights on the tunnel entrance - which is a wall of black bricks.|
|Opening up the side panels reveals the four cylinder engine. The crankshaft realy rotates and the cylinders go up and down when the engine has power.The wires ended up getting a little messy...|
|These fan blades, made from small BBB wheels rotate on top of the engine when the engine has power.|
|In the dark, the cab is lit by a standard 9v light. Two headlights are made from 'Peglights' made by Will Chapman. They are high intensity white LEDs that work very well.|