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Boeing 777X exhaust system

Boeing 777X Titanium Nozzles

Boeing 777X exhaust system

Safran Nacelles

Exhaust system length 2.2 meters

Exhaust system diameter 1.4 meters

Engine reference GE9X from GE Aviation

Aircraft category/class Long-haul airliner

Safran Nacelles’ titanium nozzles equip the Boeing 777X and its GE aviation GE9X engines.

Boeing 777X exhaust system

Product Nacelles and thrust reversers

Safran Nacelles

Exhaust system length 2.2 meters

Exhaust system diameter 1.4 meters

Engine reference GE9X from GE Aviation

Aircraft category/class Long-haul airliner

The 777X nozzles are lighter than a standard exhaust system (-20%).

The exhaust system has superior resistance to high temperatures (more than 600°C).

The nozzles integrate acoustic treatments that reduce the engine footprint noise.

Mostly manufactured from titanium, this system integrates a nozzle that optimizes the turbojet’s engine aerodynamic exhaust flow. Part of its surface is acoustically treated which contributes to reducing the engine footprint noise.

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One of the largest exhaust systems in civil aviation
Safran Nacelles’ titanium nozzles on the Boeing 777X

Optimization of design and manufacturing processes for metallic materials

Nozzle Center - Drilling and sanding of A380 titanium nozzle

Lighter metallic alloys

Safran Nacelles is an expert in exhaust systems, from design to manufacturing. They contribute to the thrust of the aircraft by channeling the engine-generated hot airflow and by ensuring the continuity of cold air exiting the nacelle. They are designed in very fine metallic alloys -0.016 to 0.0.6 inch thick (0.4 to 1.5mm thick)- that lightens the mass, are corrosion-resistant and support extreme temperatures in excess of 600°C/1,112°F

Laying of the honeycomb (acoustics structure) on the front of a primary nozzle

Acoustic treatments to reduce engine noise

Honeycomb acoustic treatment is applied in strategic areas of the GE9X exhaust system on the Boeing 777X. Many thousands of holes are drilled in the composite skin so that the noise can disperse and be captured in the honeycomb core. This process significantly reduces the engine noise. Safran Nacelles holds a unique expertise in engine environment acoustic technology.

  • © Safran
  • © Patrick Boulen / Safran
  • © STEPHEN BRASHEAR / GETTY IMAGES NORTH AMERICA / AFP
  • © Philippe Stroppa / Safran
  • © Adrien Daste / Safran