n797mx From United States of America, joined Mar 2009, 363 posts, RR: 0 Posted (3 years 5 months 3 weeks 1 hour ago) and read 4921 times:
Today I was watching this video of an MD-11 landing and noticed that the reversers did not deploy simultaneously as normally seen on airliners. Is this a commonality in some cases, was the pilot doing this to correct for not being on center, or was he just clumsy and did not pull the reverser handles evenly?
wingscrubber From UK - England, joined Sep 2001, 860 posts, RR: 0
Reply 2, posted (3 years 5 months 2 weeks 6 days 21 hours ago) and read 4795 times:
Yep #3 reverser seems to deploy a couple of seconds before #1, with #2 out of camera shot.
My theory: either the reversers were manually activated out of sequence (most likely) or, because each thrust reverser is powered by a separate hydraulic system, if engine RPM was higher on engine #3, it would have higher available flow from the hydraulic pumps, which could have opened the right hand TR more quickly.
CosmicCruiser From United States of America, joined Feb 2005, 2268 posts, RR: 15
Reply 3, posted (3 years 5 months 2 weeks 6 days 20 hours ago) and read 4762 times:
I think y'all are getting way too technical. I would say if you think about it or if you've ever held the reverse levers in your hand that it's very easy for the little fingers on no.3 to lift slightly before your other fingers pull #1 & #2. not a big deal. Also if the rpm were higher as one post suggests then the throttle would not be in idle and the reverser would not deploy. Sometime they can be a little more difficult than others in moving the levers.
longhauler From Canada, joined Mar 2004, 5876 posts, RR: 43
Reply 4, posted (3 years 5 months 2 weeks 6 days 19 hours ago) and read 4715 times:
Exactly, it's just a mechanical lever, and some are easier than others ... making one deploy quicker than the other. It is not normally a big deal. Heck, when you are dispatched with one reverser inop, you still use the other on landing or rejected take-off.
Just because I stopped arguing, doesn't mean I think you are right. It just means I gave up!
mandala499 From Indonesia, joined Aug 2001, 7452 posts, RR: 77
Reply 5, posted (3 years 5 months 2 weeks 6 days 19 hours ago) and read 4689 times:
Hey, you can land without reversers (it's not included in the dispatch landing calculations)... so, what's the big deal? And these guys were just pulling idle reverse, which is a "just in case" you need the reversers at full if something goes wrong.
Nothing to see here... move along...
When losing situational awareness, pray Cumulus Granitus isn't nearby !