When I fly any of the B787s and get above FL370 the altitude and of course speed start fluctuating/bouncing. What am I doing wrong?
You’re probably trying to climb too high/too fast for your weight.
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too high for your weight, I would stay at a lower altitude until you can climb to that height again
It happened me when I passed FL400 and was climbing to FL410 and started bouncing. Don’t think it was weight if i remember. Mabey it was sure look it’s getting reworked soon.
make sure to step climb. if you are using simbrief then it will automatically include them. i made this mistake once before and stalled over the atlantic while i was away from my phone.
Thanks. I can get a B777 to FL410 but there may be a weight issue.
Bob Hoffmann
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Thanks, I’ll try that.
Bob
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It is actually very difficult to climb to an altitude of over 37,000 feet with 100% fuel.
Yes, I experienced that too.
It’s not a weight issue from what I understand; it seems to be the autopilot doing too many corrections, which causes the bobbing.
When I disconnect the autopilot and trim the aircraft to hand-fly it, the aircraft stays perfectly level at a very healthy N1.
Something that happens to me often, and I hope it gets fixed in the rework.
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The reason is likely similar. The heavier the aircraft, the more the center of gravity shifts toward the rear, making it more difficult to climb. This instability in nose and airframe tilt can lead to autopilot malfunction.
Yes, but even at higher weights, I’ve never had issues with bobbing in other heavier aircraft such as the B777 and A380.
Only the wings would stall and weave left and right, but not up and down like in the 787.
In those cases, I’d be pretty close to max power and not close to where I’d like to be in terms of cruise speed, so from experience, it’s not comparable.
Thanks.
Bob Hoffmann
You don’t need to leave your name at the end of every message like you’re writing an email lmao
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In fact he is replying via e-mail.
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Yes I was. I’ll reply here in the future.
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I forgot we could do that, still funny to see it though
You can’t fly at a fixed altitude like 40,000 ft when the aircraft is fully loaded. On long-haul flights, the plane usually starts lower(35,000)and then climbs gradually over time, sometimes reaching higher cruise levels after a few hours or when it becomes lighter
That’s good to know. Thanks.
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