blast
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EK A380 Takes Off Like A Rocket

Wed Nov 28, 2012 10:32 pm

On Tuesday I happened to watch Emirates' daily A380 service to DBX use little runway at AMS and take off like a rocket, before banking and leveling off a bit. Does anyone know anything about load factors on this route? I know it is a 6:30 hour flight to DBX so it won't need a full fuel load, but that could be compensated with more pax and freight..

(Searched for info in this forum, apologies if this has been dealt with earlier).
 
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EK413
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RE: EK A380 Takes Off Like A Rocket

Wed Nov 28, 2012 10:55 pm

Quoting Blast (Thread starter):

Taking the 6 hour & 30 minutes flight time into account plus the fact an A380 requires 20% less runway than say a B744 I wouldn't be surprised these are the reasons for a quick rotation...

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AirIndia
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 4:52 am

Quoting Blast (Thread starter):
Does anyone know anything about load factors on this route?

Wouldnt be surprised if the SF was in excess of 75%...
 
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sturmovik
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 8:59 am

Could it be due to noise abatement procedures? Just curious..
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9MMPQ
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 9:17 am

No idea on loadfactors but some days you see it get off the runway quickly & on other days you don't. For example, last Tuesday they seemed to use much more runway. I don't really think you can determine a lot based on it though, it's a relatively short route with 6 hours 30 minutes.

Quoting sturmovik (Reply 3):
Could it be due to noise abatement procedures? Just curious..

Definitely no noise abatement procedures which require one to be airborne already halfway down the runway.

[Edited 2012-11-29 01:19:58]
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76er
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 9:27 am

No.
Normal procedure at AMS is the NADP1 for all aircraft. Meaning takoff thrust (full or derated) until 1500ft, followed by climb thrust. Speed between approx V2+10 up to V2+25 till 3000ft, then accelleration to 250kts or higher as dictated by either local regulations or aircraft performance.

Most aircraft will takeoff with the maximum allowable thrust reduction on takeoff, for reduced engine wear. For mechanical or weather reasons it may happen that full thrust is required for takeoff, which may be an explanation for the very short takeoff roll and steep initial climb.
 
777way
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 1:06 pm

Somewhat related why are some takes offs at a slow speed almost like a cruise while others are like a rocket, for example in a place like Karachi where there are no enviromental laws, sometimes airliners are flying out like at fighter jets speed while usually its a normal rate, whats the reason behind this?

As for sound I have seen PIA 777s fly out so silently after take off that if they hadnt caught your eye you wouldnt know they were around and this is like maybe two minutes after take off, what causes the engines to not make any sounds?
 
brilondon
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 1:36 pm

What was the weather like on the days you are comparing this to? The weather plays a large part in how long a take off run is needed. The head winds, the temperature, the humidity and event the barometric pressure can have an effect on the aircraft's runway length.
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migair54
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 3:30 pm

Quoting 777way (Reply 6):
As for sound I have seen PIA 777s fly out so silently after take off that if they hadnt caught your eye you wouldnt know they were around and this is like maybe two minutes after take off, what causes the engines to not make any sounds?

Wind, the wind can take away the noise from your position.

Also Wind can also reduce the Ground Speed and the climb gradient, so less forward speed and more vertical speed, so you say that they use the little runways that could indicate a strong wind for departure and thus the selection of the little runway.
 
AmericanAirFan
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 6:19 pm

Wind can have a big impact. Weight can also have a large impact. When I've been spotting at LAX, I had planes all rotate and climbing out in relatively the same spots compared to the control tower all day. I had some photos of a 757 that got off with very little runway and climbed out like a rocket clearly flying high above the control tower from my vantage point. My guess is that it was light, but in your situation it could have also been wind.
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 6:25 pm

Quoting EK413 (Reply 1):

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blast
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RE: EK A380 Takes Off Like A Rocket

Thu Nov 29, 2012 7:26 pm

Quoting 76er (Reply 5):
Normal procedure at AMS is the NADP1 for all aircraft. Meaning takoff thrust (full or derated) until 1500ft, followed by climb thrust. Speed between approx V2+10 up to V2+25 till 3000ft, then accelleration to 250kts or higher as dictated by either local regulations or aircraft performance.

Most aircraft will takeoff with the maximum allowable thrust reduction on takeoff, for reduced engine wear. For mechanical or weather reasons it may happen that full thrust is required for takeoff, which may be an explanation for the very short takeoff roll and steep initial climb.

Thx 76er and the others, that's interesting info.

Quoting brilondon (Reply 7):
The weather plays a large part in how long a take off run is needed. The head winds, the temperature, the humidity and event the barometric pressure can have an effect on the aircraft's runway length.

Weather-wise it wasn't a special day. There was little wind (south south east) and the temperature would have been in between 6 en 8 degrees C. Obviously that is dense winter air. Humidity was 91% and barometric pressure was 1003hPa (14.55 psi) Plane took off from the Kaagbaan (runway 24) btw.

Quoting EK413 (Reply 1):
an A380 requires 20% less runway than say a B744

The EK A380 is the only A380 we have at AMS, so it's kinda difficult to compare.

I flew AMS DXB AMS in november 2010 on EK but back then they operated their 777s, which in my case were about 80 % filled.
 
mffoda
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RE: EK A380 Takes Off Like A Rocket

Fri Nov 30, 2012 12:36 am

I personally believe the OP's experience has more to do with the sheer size of these large aircraft. As someone who has been close (like just off the runway) to many of these take-offs it seems almost unreal that they get in the air that quickly.

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