Why Boeing's Quieter Engines Carry A Penalty No Airbus Aircraft Accepts

For years, NASA worked on sawtooth edges on aero engines to reduce noise. The Boeing 777X Lacks ChevronsCredit: ShutterstockPetter Hörnfeldt ended the video implying that the chevrons represented an advancement for Boeing aircraft. Chevrons are an external way to help reduce noise, while subsequent engines have a better understanding of turbulence. Improvements throughout the engine reduce noise and replace the need for an external serrated solution. Rolls-Royce's massive UltraFan demonstrator is working to find ways to reduce noise.