What is the role of fusible plugs in aircraft tire assemblies?

Fusible plugs serve a critical safety function in aircraft tire assemblies by preventing tire explosions due to overheating. When aircraft tires experience excessive heat, often caused by prolonged use or rapid stop-and-go operations, the air inside the tire can expand and increase pressure to dangerous levels. The fusible plug, which is made from a material that melts at a specific temperature, acts as a safety valve. If the temperature exceeds a certain threshold, the plug will melt, allowing air to escape from the tire. This controlled release of air helps to reduce pressure inside the tire, thereby preventing a potential blowout or explosion.

While other components of tire assemblies play various roles, such as managing pressure or enhancing traction, the unique function of fusible plugs is primarily related to safety. They ensure that in conditions where tires could fail due to excessive heat, the situation is mitigated effectively. This illustrates their essential role in maintaining operational safety during flight and ground operations.