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Nice to see the Dreamliner leaving Farnborough with a Spitfire fighter escort.
Is Boeing afraid, that there could still be some Messerschmidts around?
Best regards from Germany
Question for anyone who has seen the 787 live: is it really that quiet? The noise on takeoff once airborne seem astonishingly low. During the flyby with the spitfires, they appear to be louder than 787. Do the chevron’s make that much difference? Just wondering.
Yes, it really is that quiet. I’ve seen them take off and land from every possible angle (but always as close to them as I could get) and am always amazed at the contrast between a 787 and 767 or 757. According to Rolls-Royce, a 787 with it’s Trent 1000s at maximum thrust is 3dB quieter than a 767, which means it’s actually HALF as loud (dB is a logarithmic scale).
Other very nice video… enjoy!!!
it was great meeting you in person at the Flight chalet after reading your blog nearly from the beginning.
The 787′s escort during departure put a nice historic touch to the event, with Rolls-Royce finest engines (old and new) flying in such a close formation. And the Spitfires were indeed louder than the 787 (at least until ZA003 increased thrust a bit for the pitch-up and climb-away).
Greetings from Germany and keep up your style of reporting and pioneering usage of new technologies to bring us the goodies,
I was lucky enough to be along the runway at Paine Field during first flight, and I remember hearing the T33 chase planes while barely being able to make out the sound from the 787 itself. Granted, it was a lightly loaded fuselage and far from both Max Takeoff Weight so the engines didn’t need to work that hard.
great videos! The 787 on the light load out can real preform. The initial turn looked sharp.
The RR in the Spitfires sound so sweet. It was a nice contrast between the old and the new.
[i]According to Rolls-Royce, a 787 with it’s Trent 1000s at maximum thrust is 3dB quieter than a 767, which means it’s actually HALF as loud (dB is a logarithmic scale).[/i]
3 dB less noise means half of the emitted sound but a normal person doesn’t hear a difference of 3 dB!
If one airliner makes 100 dB, two airliners at the same time and distance make 103 dB. The problem: Only with a trained ear you’ll hear the difference!
So if the B787 really makes only 3 dB less noise than an B757 or B767, nobody would recognize the difference.
Best regards from Germany
@Liz that’s not completely right. -3dB equates to a loudness reduction of about 25% meaning the 787 engine is about 75% as loud as a 767 engine. You’re right, dB is a logarithmic scale, but it doubles every 6dB, not every 3 dB.
now thats what i’m talking bout!
As always, dB is just a logarithmic scale. Depending on what unit you are talking about, 3 or 6 dB could be doubling.
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