The Gnome rotary engine is a type of internal combustion engine that was popular in early aviation, particularly during World War I. It features a unique design where the cylinders rotate around a fixed crankshaft, providing a high power-to-weight ratio. This design allows for smoother operation and better cooling, making it suitable for aircraft. One of the most notable aspects of the Gnome rotary engine is its simplicity and reliability. The engine's rotating mass helps to counteract the torque effects, making it easier to control the aircraft. This engine was widely used in various early fighter planes, contributing significantly to the development of aviation technology.