Cylinders

The Wright Flyer... made the first sustained flight by a manned heavier-than-air powered and controlled aircraft on December 17, 1903.

Since they could not find a suitable automobile engine for the task, they commissioned their employee Charlie Taylor to build a new design from scratch, a lightweight 12-horsepower (9-kilowatt) gasoline engine, weighing 180 pounds (82 kg), with a 1-US-gallon (3.8 L; 0.83 imp gal) fuel tank.