n797mx From United States of America, joined Mar 2009, 96 posts, RR: 0 Posted (8 months 4 weeks 10 hours ago) and read 3167 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, 834 posts, RR: 0 Reply 2, posted (8 months 4 weeks 7 hours ago) and read 3041 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, 2212 posts, RR: 16 Reply 3, posted (8 months 4 weeks 6 hours ago) and read 3008 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, 4280 posts, RR: 36 Reply 4, posted (8 months 4 weeks 5 hours ago) and read 2961 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.
Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
mandala499 From Indonesia, joined Aug 2001, 6180 posts, RR: 74 Reply 5, posted (8 months 4 weeks 4 hours ago) and read 2935 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 !