1. Draw the front of the train first.
2. Two horizontal and vertical pipes.
Draw two taxis in the back.
4. Draw a wheel below.
5. Smoking on the motorcycle.
6. Paint the taxi gray.
7. Paint the roof orange.
8. Colour the wheels black and the windows blue.
Train operation principle:
The bogie of the train is stuck on the track and runs along the track. When turning, the bogie rotates to keep the train running along the track. The outer rail is higher than the inner rail when turning.
The original trains were drawn by ropes or horses. By the19th century, most trains were pulled by steam locomotives. After the 1940s, steam locomotives were gradually replaced by diesel locomotives which were cleaner and needed less labor, and then electric locomotives and multiple units appeared.
The initial investment of electrified railway is large, but the operating cost per mile is the lowest. Therefore, only high-flow lines are suitable for electrification. Electrified trains may use overhead cables or the third rail to obtain electricity.
If the cost of unit fuel or unit power is considered to operate rail vehicles, it is the best economic benefit of energy use to operate in groups, that is, a group of four vehicles. Commuter trains that stop at every station have the highest cost performance.