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TakeOff
Topic Author
Posts: 82
Joined: Mon May 10, 2004 7:24 am

777-200: Rolling After Take-Off

Fri Jun 10, 2011 11:36 am

I was recently on a CO flight from EWR to LHR (777-200) and experienced a very strange take-off. The second we were in the air, the plane started to lightly roll first to the left and then to the right. It did this a total of four times, with every roll being more pronounced than the last one. First thing that came to mind was wake turbulence (would it cause something like that?) or a sudden gust of wind even though it was dead calm that day. Can't say I didn't get a little nervous and from the few raised eyebrows around the cabin it seemed like other passengers felt the same way. Any idea what might have caused that? The rest of the flight was the way it should be: uneventful. Thanks in advance for any responses.

TakeOff
 
tdscanuck
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RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 12:46 pm

Quoting TakeOff (Thread starter):
The second we were in the air, the plane started to lightly roll first to the left and then to the right. It did this a total of four times, with every roll being more pronounced than the last one. First thing that came to mind was wake turbulence (would it cause something like that?) or a sudden gust of wind even though it was dead calm that day.

Given that it was a dead calm day, it sounds like you may have flown through the wake of another aircraft that initiated a roll followed by a little bit of pilot-induced oscillation (PIO). But that's wild speculation...could be all manner of local weather effects alone.

Tom.
 
wilco737
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RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 1:11 pm

Quoting tdscanuck (Reply 1):

That came to my mind as well. Wake turbulence can be pretty strong, but maybe that one was a little while ago when the precedding airplane departed so it wasn't that strong anymore. And then the pilot maybe overcontrolled, so rolled to the other side and back and forth until it was smooth again.
Nothing to worry about  

wilco737
  
 
rcair1
Posts: 1147
Joined: Wed Oct 28, 2009 8:39 pm

RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 1:55 pm

Quoting tdscanuck (Reply 1):
Given that it was a dead calm day, it sounds like you may have flown through the wake of another

I had a similar experience on an A320 out of SEA the other day. When we landed, I asked the pilot and he confirmed he thought it was wake turbulence from a heavy that had departed ahead of us (headed overseas).
rcair1
 
louA340
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RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 4:51 pm

I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?
 
wilco737
Posts: 7275
Joined: Sun Jun 20, 2004 12:21 am

RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 5:28 pm

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC

I have never done that and I am not intending to. At low altitudes I keep the wings level and concentrate on the departure route...

wilco737
  
 
rcair1
Posts: 1147
Joined: Wed Oct 28, 2009 8:39 pm

RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 5:55 pm

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

Only if their girl (or boy) is in the tower...
rcair1
 
PGNCS
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RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 6:48 pm

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

Not if they want to fly for the airlines very long.
 
B747forever
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RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 10:31 pm

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

That would just be plain stupid.
Work Hard, Fly Right
 
RussianJet
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Joined: Sat Jul 21, 2007 4:15 am

RE: 777-200: Rolling After Take-Off

Fri Jun 10, 2011 11:36 pm

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

Yeah, followed by a couple of barrel rolls.
✈ Every strike of the hammer is a blow against the enemy. ✈
 
alasizon
Posts: 2598
Joined: Sat Apr 28, 2007 8:57 pm

RE: 777-200: Rolling After Take-Off

Sat Jun 11, 2011 1:25 am

Quoting RussianJet (Reply 9):
Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

Yeah, followed by a couple of barrel rolls.

More likely followed by a pink slip.
Airport (noun) - A construction site which airplanes tend to frequent
 
LTC8K6
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RE: 777-200: Rolling After Take-Off

Sat Jun 11, 2011 1:33 am

 
tdscanuck
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Joined: Wed Jan 11, 2006 7:25 am

RE: 777-200: Rolling After Take-Off

Sat Jun 11, 2011 5:25 am

Quoting LTC8K6 (Reply 11):
The waving goodbye seems to be common at Boeing with delivery flights.

Yes, but:
1) They're delivery flights, not commercial flights.
2) They wait until established in a stable climb and the gear is coming up before doing the roll. The OP's example started right at liftoff.

Tom.
 
Mir
Posts: 19491
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RE: 777-200: Rolling After Take-Off

Sat Jun 11, 2011 6:45 am

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

That's what the radio is for.

-Mir
7 billion, one nation, imagination...it's a beautiful day
 
LTC8K6
Posts: 1587
Joined: Fri Jun 05, 2009 8:36 pm

RE: 777-200: Rolling After Take-Off

Sat Jun 11, 2011 10:16 pm

Quoting tdscanuck (Reply 12):
Yes, but:
1) They're delivery flights, not commercial flights.
2) They wait until established in a stable climb and the gear is coming up before doing the roll. The OP's example started right at liftoff.

Tom.

Yes, that's why I said they were delivery flights...I assumed A.netters knew what one was.  

How would the OP really know "the second" they were off the ground?  
 
alasizon
Posts: 2598
Joined: Sat Apr 28, 2007 8:57 pm

RE: 777-200: Rolling After Take-Off

Sat Jun 11, 2011 10:19 pm

Quoting LTC8K6 (Reply 14):
How would the OP really know "the second" they were off the ground?

Well, usually it tends to be accompanied by a gain of altitude.
Airport (noun) - A construction site which airplanes tend to frequent
 
LTC8K6
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RE: 777-200: Rolling After Take-Off

Sun Jun 12, 2011 1:24 am

Quoting Alasizon (Reply 15):
Well, usually it tends to be accompanied by a gain of altitude.

Yes, but what does that have to do with the comparison question I asked tds? Both situations are accompanied by a gain of altitude, I hope.
 
tdscanuck
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Joined: Wed Jan 11, 2006 7:25 am

RE: 777-200: Rolling After Take-Off

Sun Jun 12, 2011 6:43 am

Quoting LTC8K6 (Reply 14):
How would the OP really know "the second" they were off the ground?

It depends a great deal on how in tune the OP was with the aircraft but, once you know what you're looking for, the feeling of the MLG coming free of the runway surface is quite distinctive. There is a pulse from the oleos bottoming out and a change in the aircraft motion as the center of rotation moves from the MLG pivot to the aircraft CG. Even on an aircraft the size of a 777 it's quite easy to pick out.

Tom.
 
ShyFlyer
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Joined: Fri Jun 19, 2009 11:38 pm

RE: 777-200: Rolling After Take-Off

Mon Jun 13, 2011 12:08 am

Quoting louA340 (Reply 4):
I'm not an expert on this, but don't pilots sometimes roll back and forth after takeoff as a way to wave off and say goodbye to ATC?

Never heard of that, but rocking of the wings is a way for one aircraft to signal to another that they have been intercepted. The intercepted aircraft will also rock their wings to acknowledge the intercept.
https://www.faasafety.gov/files/gslac/courses/content/24/293/Interception%20Procedures.pdf

But the OP's 777 wasn't being intercepted.
I lift things up and put them down.
 
cvg2lga
Posts: 447
Joined: Fri Feb 25, 2005 11:48 am

RE: 777-200: Rolling After Take-Off

Mon Jun 13, 2011 12:27 am

Rocking the wings: That's how we said goodbye to Seattle onboard N624US on the retirement party's flight back to MSP. FWIW.


Tchau

DA-
They don't call em' emergencies anymore. They call em' Patronies.
 
Woof
Posts: 84
Joined: Tue Jul 21, 2009 9:00 am

RE: 777-200: Rolling After Take-Off

Wed Jun 15, 2011 9:18 pm

Quoting TakeOff (Thread starter):
idea what might have caused that?

PIC holding the column between his legs while trying to light a fag (cigarette for you US folk   ) ?
Deleted
 
MrFord
Posts: 136
Joined: Mon Jan 15, 2001 9:03 am

RE: 777-200: Rolling After Take-Off

Thu Jun 16, 2011 8:59 pm

Maybe a long shot, but could it be related to MARINER2 SID?

On departure from the 22s, there's a slight left, then right turn right after takeoff
"For radar identification throw your jumpseat rider out the window."
 
wilco737
Posts: 7275
Joined: Sun Jun 20, 2004 12:21 am

RE: 777-200: Rolling After Take-Off

Thu Jun 16, 2011 9:05 pm

Quoting MrFord (Reply 21):
Maybe a long shot, but could it be related to MARINER2 SID?

On departure from the 22s, there's a slight left, then right turn right after takeoff
Quoting TakeOff (Thread starter):
It did this a total of four times,

4 times is a little much for that departure. But could've been.

wilco737
  
 
MrFord
Posts: 136
Joined: Mon Jan 15, 2001 9:03 am

RE: 777-200: Rolling After Take-Off

Fri Jun 17, 2011 3:48 pm

Quoting wilco737 (Reply 22):
4 times is a little much for that departure. But could've been.

That was my thought too, but at least the first 2 would fit the bill, if they departed south.
"For radar identification throw your jumpseat rider out the window."
 
star_world
Posts: 943
Joined: Mon Jun 25, 2001 7:52 am

RE: 777-200: Rolling After Take-Off

Fri Jun 17, 2011 6:31 pm

Quoting MrFord (Reply 21):

Maybe a long shot, but could it be related to MARINER2 SID?

On departure from the 22s, there's a slight left, then right turn right after takeoff

Having flown out of EWR hundreds of times (most of them from 22R) I am certain that this is what the OP experienced. The turn can be at a dramatically low altitude on a widebody a/c, and there are frequently further turns required due to vectoring by ATC or due to weather.

The OP could always check liveatc.net or flightaware.com to hear the ATC comms during the departure, or see the route taken.

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