Firewall (engine)

Lore & Background

In aerospace engineering, an aircraft firewall isolates an engine from the other parts of the airframe. In single-engine aircraft, it is the part of the fuselage that separates the engine compartment from the cockpit. In multi-engine propeller aircraft, the firewall is usually part of the engine nacelle and separates the engine from the rear sections of the nacelle or from components mounted behind the engine, such as the wing structure or accessory compartments. The word 'firewall' is also used as a slang term for taking an engine to maximum power or acceleration.

Reader's Guide

The firewall in aircraft serves a critical safety function by isolating the engine from other parts of the airframe. In single-engine aircraft, it separates the engine compartment from the cockpit, while in multi-engine propeller aircraft it is typically part of the engine nacelle, separating the engine from rear sections or components such as the wing structure or accessory compartments. This compartmentalization helps contain potential engine fires and prevents them from spreading to other areas of the aircraft. The term 'firewall' also appears in slang usage to mean taking an engine to maximum power or acceleration. The article does not provide further details on the construction materials or specific regulatory requirements for aircraft firewalls.

Did You Know?

• In single-engine aircraft, the firewall separates the engine compartment from the cockpit.
• The firewall in multi-engine aircraft can separate the engine from the wing structure or accessory compartments.