What is detonation in an aircraft engine?

Detonation in an aircraft engine refers to the uncontrolled explosion of the fuel/air mixture within the combustion chamber. This phenomenon occurs when the pressure and temperature of the mixture exceed the ignition point, leading to a rapid and violent release of energy rather than a smooth, controlled burn.

In a properly functioning engine, the combustion process is designed to occur in a smooth and controlled manner, where the flames propagate through the fuel/air mixture at a steady rate, maximizing efficiency and minimizing harmful effects. However, if detonation occurs, it can result in increased cylinder pressures, potential engine damage, and a significant loss of performance. Understanding detonation is crucial for pilots, as it informs them about potential risks and engine management strategies to avoid such dangerous conditions.