Eighty-five years ago today, the first prototype turbojet aircraft, the He 178, was test-flown only days before Germany invaded Poland to start World War II. The plane could fly for only six minutes.

The Dornier Do 335 Pfeil was unlike anything else in the Luftwaffe arsenal. Powered by two inline DB 603 engines in a unique push-pull configuration, it was fast, heavily armed, and surprisingly agile ...

Bore and Stroke: 120 mm (4.72 in.) x 140 mm (5.50 in.) Argus is believed to have produced the first German aircraft engine in 1906, along with many other inline, liquid-cooled automotive engines ...