Meanings of jet airplanes in English

They saw five jet airplanes in a day over Portland.

One side said that Arnold had seen plain, everyday jet airplanes flying in formation.

Now, I suppose you're going to say, but Mister Ibis, these people were primitives, they didn't have radio controls and vitamin pills and jet airplanes.

Jet airplanes don't fly as fast as the speed of sound but they make a horrible roar.

Jet airplanes flying through ash clouds have been known to have all four engines cut out, and propeller aircraft aren't likely to fair much better.