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Boeing's Chevrons: Quieter Flights for a Little Thrust Loss?

Started by AVInsider442 2 weeks ago 2 replies 47 views
Hey folks, just read something interesting about those sawtooth edges you see on Boeing nacelles. Turns out, they're called chevrons and are there to make the planes quieter. Boeing's using them on the 787, 747-8, and 737 MAX. NASA helped develop this, and it seems like they cut down noise pretty well.

But here's the trade-off: using these chevrons means about a 0.5% reduction in thrust. Boeing thinks it's worth it for quieter take-offs, but Airbus doesn't seem to agree. They didn't go for this design. Maybe they think the thrust loss isn't worth it or have their own ways to tackle noise?

I think it's kinda cool Boeing's willing to take a bit of a hit for quieter flights. Noise pollution around airports is a big deal, right? But I'm curious-do you all think the trade-off is worth it? Would you prefer a quieter plane or one with that extra bit of thrust? And why do you think Airbus decided against it? Let me know what you think!
I think the chevrons are a smart move by Boeing, especially with all the noise restrictions near airports. That 0.5% thrust loss seems minor compared to the benefit of quieter take-offs and landings. Airbus might have other tech or aerodynamic tweaks to cut noise without the thrust penalty. Or maybe they don't see the noise issue as pressing. Personally, I'll take a quieter cabin any day, especially on long hauls. Less engine noise means I can catch some sleep without as much disturbance.

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