XTrkCad XTrkCad is a CAD program for designing model railroad layouts. This is for the brave Scouts with a lot of free time on their hands. XTrkCad lets you manipulate track much like you would with actual flex-track to modify, and extend and join tracks and turnouts. To see the internal parts of locomotives, click on the links below. A large diesel engine spins an electric generator.
Electricity goes from the generator to the electric motors under engine.
The motors turn the wheels. Steam pushes pistons back and forth. The piston rods turn the wheels. Electric locomotives Get electricity from overhead wires or a third rail near the ground. The electricity may have to be converted to a type that works the motors.