What is the purpose of insulation blankets in a turbine engine installation?

• A. They protect the fuselage from heat radiation.
• B. They are used to prevent icing on the engine intake.
• C. They reduce heat loss from the exhaust system, improving engine performance.
• D. They seal the exhaust to the atmosphere.

Answer: (C)

Insulation blankets are used to keep the heat contained around the hot exhaust and turbine areas, reducing the amount of heat that radiates to the surrounding structure. By wrapping the exhaust system, they minimize heat loss to the airframe and nearby components, which helps protect the aircraft and conserve energy in the exhaust flow. This containment supports better overall engine performance because less energy is wasted as heat to the surroundings and the hot areas are protected from thermal stress. While insulating can also reduce radiant heat reaching the fuselage as a side effect, the primary purpose is limiting heat loss from the exhaust path, not sealing or icing-related functions. They do not serve to seal the exhaust to the atmosphere.