The 20th century was the age of the internal combustion engine. The fruits of industrial progress produced power plants tasked with everything from running generators to powering warplanes. The First ...

Click to open image viewer. This is one of the first U.S. air-cooled, radial aircraft engines, an original design, entirely hand built by Henri L. Albisser about 1909. It powered an aircraft that he ...

As with many things in technological development, identifying the most revolutionary designs depends in part on what aspects one wants to stress. And when it comes to commercial aircraft engines, it ...