As the tests began, the engines changed in pitch from an eerie whistle to a low roar.

For the 1959 model, engines and horsepower ratings did not change.

The engine changed pitch as he reversed the props.

His engines changed pitch as they breathed thicker air.

The central engine of fraud never changes: tell lies to gullible people until they hand over their money.

Space-folding engines would change the human race and reshape the future.

It was not unusual to see an engine changed every day in a unit of six aircraft.

There was a sudden whine as the engines changed pitch.

The basic engine has not changed at all.

The engine changed several times, but now we're using Gamebryo.