Jet Planes Operate by

Jet planes operate by

A) magic.
B) sucking in air, heating it , and allowing it to expand out the back end of the engine.
C) rocket drive [i.e., ejecting heated rocket fuel rapidly out the back end of the engine].
D) sucking in air and blowing it rapidly out the back of the engine by means of propeller blades inside the engine.
E) ejecting ions out the back end of the engine.