While modern engines feature many tweaks and improvements on the original ideas, they usually aren't as interesting as the strange contraptions engineers experimented with in the early days. Take, for ...

Click to open image viewer. Power rating: 75 kW (100 hp) at 1,200 rpm Displacement: 12.8 L (783.27 cu in.) Bore and Stroke: 110 mm (4.33 in.) x 150 mm (5.91 in.) The first successful rotary engine is ...

Click to open image viewer. The first successful rotary engine is generally attributed to the American F.O. Farwell in 1896; but the French Gnome, developed by the Seguin brothers, was much more ...