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invernyx / md11-bugs

The official bug tracker for the TFDi Design MD-11
https://tfdidesign.com/md11.php
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[BUG] - Throttle Roll-Back #1774

Open TheMD11Driver opened 1 month ago

TheMD11Driver commented 1 month ago

Describe the bug

Eng 1 throttle rolls back during takeoff

Steps to reproduce

Once clamp engages on takeoff throttle 1 will roll back to about 70% and stay there until auto flight engage above acceleration speed. Other two throttles will stay at power setting.

Expected behaviour

Engine 1 throttle should stay at same power setting as other 2

Evidence

No response

Simulator

Microsoft Flight Simulator 2020 (MSFS)

Crash

No

Phase of flight

Takeoff

Pitch

0

Bank

0

Heading

numerous

Altitude

ground

Departure

KORD

Arrival

KDEN

Cruise level

400

ZFW

356.3

CG

26

Fuel

20.2

Cost index

20

Route

KORD/09R DCT OLINN DCT OREOS DCT OBENE DCT OGALE DCT BRWRY LAWGR3 KDEN/BOSSS.I35R

Location

On runway during takeoff

Agreement

joon44 commented 1 month ago

I replied to you in Discord too. This is not a bug but rather a noisy axis signal coming from your hardware. In clamp mode you can move the throttles manually and if theres any signal coming from your hardware, it will instantly force the plane throttles to match your hardware. I recommend you push your throttles all the way to the max on takeoff. Same thing goes for idle clamp mode.

TheMD11Driver commented 1 month ago

I do push them all the way forward and it will still roll back only engine #1 to about 70% n1. I have all three thrust levers tied to the same axis. I would think if it was axis noise all 3 engines would roll back together. I have also disabled the option for manual inputs to over ride autoflight and this did not help either.

turbofandude commented 2 weeks ago

There is no code that can cause the throttle to reduce during departure without pilot input. It is very likely to be a noisy axis, which is something we've seen cause this issue before.