A contrail or a vapor trail. See the related link for confirmation.
Contrails
Smoke trail is the trail of smoke left behind by an aircraft as it flies in the sky.
Contrails or condensation trails
The stream behind a jet is called a contrail. It is actually water vapor that condenses in the cold.
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.
its called a bomber
It is called a biplane
The aeroplane without a pilot is called a drone. Drones are useful in many situations.
A bomber.
A pilot.
A pilot.
Someone who flys an aeroplane is called a pilot