The Hidden Problem of Boeing 787, 747-8 and 737 MAX Engines
The engines of modern aircraft are masterpieces of engineering: quieter, more efficient, and environmentally friendly compared to previous generations. However, according to a recent in-depth report by Simple Flying, some Boeing models with innovative noise reduction technologies are showing a problem that is not so obvious but significant. In this article, we will explore what “chevrons” are, why Boeing adopted and then abandoned them, and what all this means for air travelers.
What Are “Chevrons” and Why Were They Introduced
“Chevrons” are sawtooth-shaped grooves applied on the trailing edge of the tail of certain aircraft engines. Their function is to reduce turbulence and noise produced by the engines during flight, thereby improving the acoustic experience for residents near airports and for passengers onboard.
Boeing adopted this technology on some of its most recent and successful models:
- 787 Dreamliner
- 747-8
- 737 MAX
Despite their acoustic advantages, chevrons also have an important drawback: they slightly reduce the engine’s efficiency, thereby increasing fuel consumption.
Why Airbus Rejected the Technology
The European manufacturer Airbus chose not to adopt chevrons on its aircraft, preferring alternative solutions to reduce noise without compromising engine efficiency. This decision is based on a delicate balance between economic and ecological sustainability, which Airbus considers more advantageous by following a different strategy.
Why Boeing Abandoned Chevrons on Newer Models
As reported by Simple Flying, Boeing decided to eliminate chevrons from its newest models to increase engine efficiency. This choice is also motivated by increasingly stringent environmental sustainability standards and pressure to reduce fuel consumption and emissions. However, this may lead to increased noise levels, potentially impacting passenger comfort and communities near airports.
The Practical Impact on Flights and Passengers
Cabin and Airport Noise
For travelers, engines without chevrons could mean a slight increase in noise during takeoff and landing, phases when the engine operates at maximum power. This might affect onboard comfort, especially for those sensitive to noise. Additionally, areas around airports may experience more noise disturbance.
Efficiency and Ticket Prices
On the other hand, greater engine efficiency can translate into lower fuel consumption, reduced operating costs, and potential economic benefits for airlines. This could help keep ticket prices stable or even reduce them in the long run.
Reliability and Safety
There is no evidence that removing chevrons compromises engine safety or reliability, which remain certified according to the strictest international standards.
Tips for Passengers
- If you are particularly sensitive to noise, choose flights operated by aircraft with engines equipped with chevrons, such as older models of the Boeing 787 Dreamliner.
- Use earplugs or noise-cancelling headphones during takeoff and landing.
- Check your flight information on FlightGuard to stay updated on any changes or alerts related to the aircraft or engine model.
Want to know if your next flight is at risk? Check your flight risk on FlightGuard.
Useful Further Reading
- Learn more about the Boeing 787 Dreamliner
- Information and curiosities about Fiumicino Airport (FCO)
- All about flights at London Heathrow LHR
Knowing the technical features and technological innovations of the planes we fly helps us travel more informed and at ease, especially in an era of continuous innovations and environmental challenges.
