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View Full Version : Can anyone shed some light on this takeoff?


Tornado2006
31st Aug 2011, 17:05
Can anyone explain the apparent use of the ailerons/spoilers on takeoff?

Whilst the takeoff is obviously uncomfortable, is it actually safe?

The information from the video on youtube just gives the aircraft as a 767, and belongs to "some dodgy russian airline".

Crazy dangerous takeoff 767 in severe storm!! - YouTube (http://youtu.be/i9IhQxmt08U)

Cheers

Torque Tonight
31st Aug 2011, 17:53
Use of roll input, which you can see from the ailerons and spoilers, coupled with opposite rudder input, which you can't see, is normal when taking off with a crosswind.

To be applying so much roll input that the spoilers raise indicates a stonking crosswind and is more than my company permits. However, if that company's SOPs permit that much application of roll input and the crosswind was within limits (which you will never be able to estimate from the video) then the takeoff was legal and within safety limits.

Most pilots have a vested interested in keeping their lives and their licences and will not willfully initiate an illegal or unsafe activity. Just because it was windy, rainy etc does not mean it was dangerous. This is what we're paid to do.

Hotel Tango
31st Aug 2011, 19:12
Most pilots have a vested interested in keeping their lives and their licences and will not willfully initiate an illegal or unsafe activity.

Indeed as you rightly say "most" do, however, these days there are, with some airlines, mounting pressures on crews to push the envelope just that little bit more in the interest of remaining employed!

Nevertheless, the video doesn't indicate anything untoward other than a standard cr@ppy weather take-off with a x-wind.

whatdoesthisbuttondo
1st Sep 2011, 07:26
Boeing in the flight crew training manual recommend using just enough aileron to keep the wings level until rotation and then applying it as the nose comes up, the aircraft should be kept straight with the rudder.

The reason you shouldn't use much into wind aileron on the take off is to avoid the asymmetric spoiler as you see in the video. This (according to boeing) creates more drag and reduces tail clearance on rotation.

It's certainly an incorrect technique to use as far as the manufacturer Boeing see it. If you use non Boeing approved techniques you might find yourself in a spot of bother if you have an off runway excursion or some other exciting event.