Hello,
I recently started my flight from EGLL-KMIA in a Boeing 787-10 as started to level off at my crusing altitude the plane suddenly started to rock like pitching up and down violently eventually i had to descend a bit and get stabilize but i don’t i know left the plane on AP+ but i faced this issue with every 787 series
Device: OnePlus 6t
Operating system:Android_9
Hey there!
What was your cruising altitude, speed and weight %.
My crusing altitude was fl400, speed was mach .85 and weight was above somewhere above 200,000(kgs) but well with in the limits for safe take-off and landing weights
So around 55% weight load - which is probably a bit high for FL400. I would’ve gone FL360-FL380.
Ya so when th plane started rocking at fl400 i immediately started descending to fl380 and it got bit stabilized but I don’t know this the second time i encountered the problem with 787 series
Hello, is there wind?
yes there was headwind 70-80 knots during the climb
Thanks for the information. That’s definitely very heavy headwind. I guess it’s the cause of this issue.
If there is heavy headwind, it would be good to cruise relatively lower, because your engines will be less “stressed”, and it decreases the chance of similar problems occurring. Hope this helps🙂
Hmm maybe… But i don’t agree to the fact that the plane should pitch so violently or it is just physics
Hi!
At cruise, make sure your Angle of Attack (AOA) isn’t too big. It should be around or lower then 2° to maintain efficient and stabilised flight. You can find the AOA in one of the flight parameters on the bottom of the screen 
Ollie
For me, 3° is optimal for the 787. I test at MTOW, MMO, @ 31,000. Comes out to 3 degrees. If I go higher, higher AoA and fuel burn. Go lower, lower AoA but higher fuel burn. Step climbing, it’s still 3°, and I think that’s just how it flies in the sim. Hoping the rework fixies the higher AoA efficiency.
Hi, a sudden strong enough change in wind might destabilize you if you are near your limits for being high and heavy. But such fast enough change would be fairly rare.
A strong, relatively steady, head wind has no effect on stability.
For example, you wouldn’t notice any differece in flight characteristics with a stready 1000kt headwind, if that were possible.
I frequently use the 787 family and experience this too
In my experience this isn’t a altitude/load issue but rather a speed issue
You probably know that after FL280 the unit of speed changes from knots (IAS) to mach
And as you climb above to FL300,FL320,FL340,etc the mach speed stays the same but the knots(IAS) decreases
Typically what i noticed is that when you climb above FL360 and the Knots(IAS) decrease below 230-220 knots the wobbling occurs with AutoPilot
A simple solution is to just increase your speed to M0.86 or however is necessary
Try it out and let me know if it works
Maybe it’s a small bug in the game then🤔
Oh, I see, thanks for the explanations! Then it might be a small bug in the game. Hope the developers can fix it soon🙂
I hope they will
The wind really doesn’t make a difference…
You’re right, sorry, maybe it’s a small bug? I saw many people have reported similar issues before.
I think he was just trying to cruise too high for his aircraft and weight. I mean, the 787-10 does not go to FL400 often irl, and would never go straight to FL400 as its cruising altitude unless it is lightly loaded on a short-haul flight.