The Gnome Rotary Engine is a type of internal combustion engine that was widely used in early aviation, particularly during World War I. It features a unique design where the cylinders rotate around a fixed crankshaft, allowing for a compact and lightweight engine. This design provided a high power-to-weight ratio, making it ideal for aircraft of that era. One of the most notable aspects of the Gnome Rotary Engine is its simplicity and reliability. The engine's rotating motion helped to cool the cylinders and reduce the risk of overheating. This made it a popular choice for many early fighter planes, contributing to the development of aviation technology during the early 20th century.