777222LR wrote:Hey there!
It's been so long since I've posted on Airliners.net. I've been in the forums since around 1998, but not super-active as of recent. I have a question about the A350-1000 going from max thrust to climb thrust.
Recently I flew with Qatar Airways to Dubai. The DFW-DOH sectors were on an A350-1000, the DOH-DXB were on the A350-900. It was my first time on an A350-1000. On climb out from DFW, when the aircraft went from MAX to Climb thrust, the entire plane felt like it jerked, like when you pump the brakes to stop really quickly in a car. It was noticeably smoother on the A350-900.
I was curious as to why this was? It happened both times on the DFW-DOH-DFW legs, but not on any A359 flights I've been on.
Here's a video from the take off from DFW: https://www.youtube.com/watch?v=0NAHM2fJBgk
The switch happens around 1:17. You can actually see the camera move suddenly when it happens.
More likely what has happened is your ears have played tricks on you. Sometimes the standard departure from airports has a relatively low level off segment, this is often to allow for other aircraft to cross above. When the aircraft levels off it can feel like deceleration, because you are level thrust comes back sometimes below climb thrust. They use the same technique in full flights simulators to provide the sensation of acceleration by tilting the bix the simulator is in.
777222LR wrote:No, this was not only audible, I felt it. I was in a rear facing business seat, and both times on the A350-1000 I was thrown into the back of my seat rather abruptly due to the quick deceleration. I've flown the A350-900 many times and this has never happened. This happened both on DFW-DOH and on DOH-DFW.
zeke wrote:777222LR wrote:No, this was not only audible, I felt it. I was in a rear facing business seat, and both times on the A350-1000 I was thrown into the back of my seat rather abruptly due to the quick deceleration. I've flown the A350-900 many times and this has never happened. This happened both on DFW-DOH and on DOH-DFW.
A relatively low level level off would explain that, climbing at 2000 fpm level off then reduce thrust as to not over speed.
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