MichaelEI From Ireland, joined Jan 2011, 130 posts, RR: 0 Posted (2 years 2 months 1 week 1 day 5 hours ago) and read 2533 times:
I was watching a YouTube video, below, that featured a 752 landing at LGA. If you watch between 37 seconds and 40 seconds, you will see the spoilers retract slightly and go back to full deployment. I've actually noticed this on my flights on 757s before too. I'm trying to think why that would happen, but being not technically literate as such I would rather ask here. I was thinking along the lines of either the deactivation of the autobrake system to go to manual braking, or the reverse thrust system being taken off. Anyone with insight?
411A From United States of America, joined Nov 2001, 1826 posts, RR: 9 Reply 1, posted (2 years 2 months 1 week 4 hours ago) and read 2381 times:
Nothing to do with aircraft braking, nor reverse thrust.
Those spoilers are dual purpose, ground spoilers deployed after landing AND differential spoilers, for roll control assist.
Very similar to those spoilers on the later models of the B707.
Max Q From United States of America, joined May 2001, 3288 posts, RR: 19 Reply 2, posted (2 years 2 months 1 week 3 hours ago) and read 2354 times:
Quoting MichaelEI (Thread starter):
Posted Sat Mar 12 2011 18:41:15 your local time (1 day 2 hours 13 minutes ago) and read 177 times:
I was watching a YouTube video, below, that featured a 752 landing at LGA. If you watch between 37 seconds and 40 seconds, you will see the spoilers retract slightly and go back to full deployment. I've actually noticed this on my flights on 757s before too. I'm trying to think why that would happen, but being not technically literate as such I would rather ask here. I was thinking along the lines of either the deactivation of the autobrake system to go to manual braking, or the reverse thrust system being taken off. Anyone with insight?
What you saw with the slight retraction then reextension of the spoilers is most likely the technique this Pilot used to disengage the autobrakes.
This method, slightly retracting the spoilers will give you a nice smooth autobrake disengagement, which can be tricky to do by just pressing the footbrakes
[Edited 2011-03-13 19:07:37]
The best contribution to safety is a competent Pilot.
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From Ireland, joined Jan 2011, 130 posts, 
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