Smoke trail is the trail of smoke left behind by an aircraft as it flies in the sky.
Contrails
A contrail or a vapor trail. See the related link for confirmation.
Contrails or condensation trails
smoke
That is an airplane equipped with a smoke generator. The pilot maneuvers the plane to form letters and symbols with the smoke trail.
If you ever see a commercial airliner in flight behind it there will be a white tail folowing it. This is the smoke trail.
The Adventures of Kit Carson - 1951 Powder Smoke Trail 2-8 was released on: USA: 20 September 1952
If you are asking about contrails it is dependent on the temperatures aloft. At colder temperatures the water vapor in the exhaust condenses and causes the contrails you see. The blue angels and other aerobatic-performance aircraft inject a special oil "smoke oil" into their exhaust in order to leave the smoke trail you see at airshows. But the "smoke trail" you see behind civilian and commercial aircraft isn't smoke at all, it is water vapor formed as described above.
The answer is :- riff Jake Knowit-trail
That line of smoke is called a vapor trail. You can still see it on low flying planes, but it must be a jet plane.
You press spacebar and then they rocket into the sky leaving a trail of smoke then explode into colorful bursts! i have it and its pretty neat!
The stream behind a jet is called a contrail. It is actually water vapor that condenses in the cold.