Doubtful — it needs considerable power to compress the air.

He waxes lyrical about liquid-air engines (which are indeed neat, especially for refrigerating and powering vehicles) without explaining where the energy to compress the air comes from.

The wave can trap and compress the air under the lip, which creates the crashing sound associated with waves.

For example, even a bicycle tire pump's metal tube becomes hot as you compress the air to fill a tire.

It has three mechanically connected cylinders, each double acting, one to compress the air, one to compress the gas and one driven by the burned mixture.