Viscount724
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Saudia 777-200ER Takeoff Video Question

Wed Oct 30, 2013 2:06 am

The following video (from a Civil Aviation thread) shows SV's inaugural 777-200ER from JED landing and taking off at Toronto on Monday.
http://www.youtube.com/watch?v=kHmHnG4hAfY&feature=youtu.be

The takeoff segment starts at 45 seconds. At about the 1:06 or 1:07 mark, about 10 seconds after liftoff, there's what looks like a small puff of smoke. At first I thought it was from the engines (both engines simultaneously), but on looking at it again it might be inboard of the engines.

Just curious what that might be.
 
airforceone
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RE: Saudia 777-200ER Takeoff Video Question

Wed Oct 30, 2013 2:18 am

Looks like brake dust from the landing gear. I believe its just buildup from using lots of brake on the taxi in or taxi out. And when the gear got tilted most of the dust falls out.

[Edited 2013-10-29 19:20:15]
 
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CCA
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RE: Saudia 777-200ER Takeoff Video Question

Wed Oct 30, 2013 8:04 am

Yep it's brake dust, occurs when the wheels are stopped by the automatic brake (not to be confused with auto brake) as a result of selecting the gear up.

[Edited 2013-10-30 01:07:20]
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Flightsimboy
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RE: Saudia 777-200ER Takeoff Video Question

Wed Oct 30, 2013 3:17 pm

Definitely brake dust...  
 
apfpilot
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RE: Saudia 777-200ER Takeoff Video Question

Wed Oct 30, 2013 4:10 pm

In some aircraft when the gear is selected up and is retracting the brakes are applied momentarily to stop the wheels from spinning which is what you are seeing here. On other aircraft like the 737 there are rub strips in the gear well that accomplish the same thing.
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JAGflyer
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RE: Saudia 777-200ER Takeoff Video Question

Wed Oct 30, 2013 4:25 pm

Quoting apfpilot (Reply 4):

The 737 has rubstrips in the nose gear bay (look straight up inside and you'll see them). The main gear have automatic brakes prior to retraction.
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