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777W ride in turbulence

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Old 7th Oct 2016, 15:04
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777W ride in turbulence

Hi folks, just recently paxed (in the aft) of various 777W flights with different carriers/aircraft ages, and surprised how you seem to feel every single bump, no matter how light or moderate, the whole thing just jolts. I read about the turbulence suppression system, but it doesn't seem to be doing that good of a job. The A320 family that I fly also can feel harsh but it seems to do a better job in comparison....

Any 777 drivers have any idea whats going on??
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Old 7th Oct 2016, 15:33
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Don't mean to state the obvious, but the back end of a 777 is farther from the CofG than the back end of an A320.
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Old 7th Oct 2016, 15:52
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True, but doesn't explain why the thing just unquestionably rocks from side to side at the slightest bump compared with other (Airbus + Boeing) long haul aircraft of the same size.
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Old 7th Oct 2016, 16:13
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I always thought it was a bit poor in turbulence too - not enough speed stability.
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Old 7th Oct 2016, 21:37
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Well it's moving a hell of a lot faster than the A320 for one thing....
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Old 7th Oct 2016, 21:53
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Originally Posted by Una Due Tfc
Well it's moving a hell of a lot faster than the A320 for one thing....
About 8% faster in cruise, in fact.
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Old 7th Oct 2016, 21:56
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M085 vs M078 makes a big difference in turbulence....at least I assume it does with all the whining you hear coming off the NAT
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Old 7th Oct 2016, 22:29
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the lateral oscillation due to the gust suppression system has been talked about quite a bit.
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Old 8th Oct 2016, 07:27
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I sit at the pointy end, flying both the 63m & 73m long variants. I tend to spill more coffee on the longer ones. 😯
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Old 8th Oct 2016, 07:38
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Easy. Pay a bit more and travel nearer the middle.

I have noticed on the -300 that quite low amplitude lateral disturbances, nowhere near worth putting the seatbelt signs on for, are just the right frequency to “pump” oscillations in cups and glasses to the point that the liquid makes a determined bid for freedom. Quite annoying in the middle of the night when you’re not aware of it building up until you get drenched with cold tea...
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Old 8th Oct 2016, 08:16
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resonance

Good example of resonance in cups and glasses with the plane oscillation (Where is smiley "wet by cold tea"?)
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Old 8th Oct 2016, 14:00
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All I know is a few years after getting on the 747 I suddenly realised I never seemed to hit any turbulence any more...
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Old 9th Oct 2016, 06:08
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It's true, the modal gust suppression leaves something to be desired in the -300 combined with what I guess is a slightly too large vertical stabiliser for the fuselage length, all turbulence seems to be translated into tail waggle
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Old 9th Oct 2016, 07:23
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Too large ?


It always looked way too small to me, that's the problem.
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Old 9th Oct 2016, 17:59
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777 has a much better wing in turbulence than the 320.
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Old 10th Oct 2016, 05:57
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Sat in the rear a couple times across the Pacific in the 777. Seems to be a nice, rubber like bouncing motion in turbulence. Found it relaxing and put me to sleep. Personally they should 'make it bounce' like that when it's smooth.


More concerned with flying so long over water with 'only' 2 engines. Bring back the 747 I say. Who cares if it costs a little more to fill up at the service station?
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Old 10th Oct 2016, 07:31
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Originally Posted by Jonno_aus
Who cares if it costs a little more to fill up at the service station?
You mean, apart from the manufacturers, airlines and 99% of fare-paying passengers?
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Old 10th Oct 2016, 14:49
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99% of passengers care if it costs a little more to run? Ok.
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Old 10th Oct 2016, 16:03
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Originally Posted by Jonno_aus
99% of passengers care if it costs a little more to run? Ok.
They care when it gets reflected in the cost of their ticket
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Old 10th Oct 2016, 16:39
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Cut back the airline's CEOs and other managers salary and bonus? Easy!
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