主题：【原创】看灰机... 罗得岛航空展 2015 -- bangels

How is the white smoke made?

Underneath the jets there are two fuel pods (tanks) which contain diesel fuel. There is a tube from each tank to the exhaust at the back of the engine. The pilot squeezes a trigger on the control stick which starts the flow of diesel from the tank to the engine exhaust. When the diesel fuel enters the exhaust, it immediately vaporizes and creates a white smoke trail. To stop the flow of diesel fuel, the pilot squeezes the trigger one more time. This smoke trail dissipates before it reaches the ground and is considered harmless.