Problems with 787 trim when pausing

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2 tags are required: One for platform, and one for aircraft.

Are you using Developer Mode or made changes in it?

no

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

yes

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

boeing 787-10

Which aircraft version are you experiencing this issue on? (You can find this listed in the Content Manager under the Aircraft Name)

0.1.16

Brief description of the issue:

when handflying the aircraft after a few minutes it seems to gradually apply some kind of nose up trim. i think it’s supposed to be a sort of fly-by-wire autotrim type of feature however it always adds way too much so after a few minutes i have to deflect the stick fully forward just to maintain level flight. adding down trim will temporarily correct the problem but it comes right back. when engaging autopilot the aircraft immediately levels out and re-trims also.
EDIT: i found better repro steps. it’s not gradual but rather kicks in when you pause for a few minutes.

Provide Screenshot(s)/video(s) of the issue encountered:

Detailed steps to reproduce the issue encountered:

i do a normal setup, fill out fmc, weights etc.
take off. set a normal speed like 250 knots with autothrottle.
do not engage AP, just handfly the aircraft for a few minutes.
pause the sim. wait 2+ minutes
unpause, trim will shoot to 100% and trim up/down become INOP.

PC specs and/or peripheral set up if relevant:

i7-12700, gtx 970, doesn’t seem performance related

Build Version # when you first started experiencing this issue:

i only noticed it in the current version but i only recently started flying this aircraft frequently and since i rarely handfly it i did not notice the issue until a recent attempt at handflying.

:loudspeaker: For anyone who wants to contribute on this issue, Click on the button below to use this template:

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

https://www.youtube.com/watch?v=oLJT_7pk4rY
straight and level at start, unpause happens at 2:50

2

Never understood why I could not just hand fly it like the 737.
It feels like it want to fight me in flight. I hate it .

1 Like
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i tried to make a video showing the behavior and it wasn’t happening. but then i paused and tabbed out to write that down. when i unpaused my nose shot straight into the air and trim went to 100%. it also seemed like up/down trim buttons no longer worked.

after pausing and unpausing again it seems like it’s working again. very strange!

aha i was able to repro it again. next time i’ll have the screen recorder running lol. i left it paused but for like a minute or two. instead of just on and off.

4

ok i was able to capture a video

at the start i am hand flying mostly trimmed out and level. then i pause. at 2:50 i unpause and the trim shoots to 100% and is stuck there with trim buttons inop. i tried unpausing and pausing again but it stayed stuck. engaging the AP reverts it to normal.

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@spe5imen

Dev Team would like to know what peripherals you have attached for controllers please. Thanks.

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Same here. The same happens across Asobo 787-10, HS 787-9. They all became extremely out of trim and constantly pitched up/down, a full deflection on the yoke was not able to counteract it.
Pause also causes extreme deflection on the elevator and its trim.
Peripherals are Thrustmaster TCA Airbus Stick and Throttle. I’ve checked for elevator bindings, they are triggering normally.

8

logitech extreme 3d pro

9

Same issue just now. Nose up trim stuck at 100% and my trim controls on my Boeing yoke were locked out. Had to force the nose down for my entire approach. I was in the pause menu earlier in flight for a bit.

1 Like
10

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

I have the same issue and am using a Honeycomb Alpa yoke. Manual trim does not work - using the trim control does not show any effect on the Trim in the FCTL display, nor does it have any actual effect on trim.

;[aelevant, provide additional screenshots/video:

https://www.youtube.com/watch?v=oLJT_7pk4rY
straight and level at start, unpause happens at 2:50

1 Like
11

i have a trim proplem with the 787-10 787-9 when take off it just want ot gp up ant trim 100% i cant control it , this happend after an update in 2023 and they didnt fixed it idk what to do

12

Has anyone figured out how to fix this? I just discovered the bug. So frustrating! :frowning: