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TFDi MD11 Autopilot Disengages

Featured Replies

Greetings all!

I was wondering if anyone else is having issues with the A/P with this aircraft. I've watched numerous videos/tutorials for this aircraft. I can't for the life of me, get the autopilot to stay engaged after takeoff. I press it once on the runway to activate the auto throttles. When I press the button the 2nd time to try to engage it around 1000' AGL. It will engage for a moment and then disengage with "Betty" yelling "Autopilot!". 

Just wondering if anyone has any tips/tricks they use when engaging it.

"...now let's get this thing on the hump - we've got some flyin' to do!" ~ Major Kong from "Dr. Stranglove"

Scott Cebula

You are SURE you are not touching any yoke or axis like trim button on your hardware? Or have you set null zones because just a slight signal from the yoke could disconnect ap. I don't know the tfdi but spent many years in the pmdg. 

Russell Gough

SE London

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  • Author

I'm not doing any trimming when I engage the autopilot. Can't remember if my hand has been on my Thrustmaster Airbus stick or not.

This is the only aircraft in my vast virtual hangar I'm having this issue with.

"...now let's get this thing on the hump - we've got some flyin' to do!" ~ Major Kong from "Dr. Stranglove"

Scott Cebula

31 minutes ago, ndflieger said:

Greetings all!

I was wondering if anyone else is having issues with the A/P with this aircraft. I've watched numerous videos/tutorials for this aircraft. I can't for the life of me, get the autopilot to stay engaged after takeoff. I press it once on the runway to activate the auto throttles. When I press the button the 2nd time to try to engage it around 1000' AGL. It will engage for a moment and then disengage with "Betty" yelling "Autopilot!". 

Just wondering if anyone has any tips/tricks they use when engaging it.

Somewhere in EFB is a setting that prevents this. Take a scan and good luck. (Not at pc right now)

-B

  • Author
6 minutes ago, btacon said:

Somewhere in EFB is a setting that prevents this. Take a scan and good luck. (Not at pc right now)

I'm just firing up the engines in the A300 for a flight. I'll check the MD 11 EFB settings section tonight or in the morning.

Thanks!

"...now let's get this thing on the hump - we've got some flyin' to do!" ~ Major Kong from "Dr. Stranglove"

Scott Cebula

Are you using the honeycomb Bravo throttle unit? If so you only need to bump the trim wheel and the auto pilot  will disengage.

Pete Richards

I've owned every version of flight simulator since Flight Simulator 3.0 in 1988.

Windows 11 Pro loaded on a 4TB Gen5 Crucial T700 SSD, 4TB Samsung 990 Pro SSD, Ryzen 9 7950x3d, AS Rock X670e Taichi Motherboard, Gigabyte Gaming RTX 4090 OC 24GB, 64GB (2x32GB) Viper Venom  DDR5-6000MT/s, MSI 32" MAG 321UPX QD-OLED 260hz 4K Gaming Monitor.

 

 

Its a setting in the EFB, I dont remember off hand but it says something like Hardware over ride. I am not at pc. Its there it drove me crazy too.

Chris Chiozza

  • Author

No, not using the HoneyComb Bravo.

Did a quick take-off a few moments ago.

Setting "Allow Hardware Overforce" in the EFB to "No" seems to have solved the problem.

Thanks for the help!

"...now let's get this thing on the hump - we've got some flyin' to do!" ~ Major Kong from "Dr. Stranglove"

Scott Cebula

For me the AP is fairly stable except in periods of extreme turbulence I have had it kick off before.  This may actually be a feature and not a problem. 

another thing, how to fix the "stab trim" alert in all take off?

51 minutes ago, motishow said:

another thing, how to fix the "stab trim" alert in all take off?

If you look at the V speeds page (TO/APP)  once you’ve set payload and fuel you will see the proper Stab value to set via trim prior to takeoff.

-B

Edited by btacon

1 hour ago, motishow said:

another thing, how to fix the "stab trim" alert in all take off?

It is mostly betwen 6 and 7, depending on your weight..

cheers 😉

08.2024 new PC is online :  ASUS ROG STRIX X670E-F GAMING WIFI Mainboard,  AMD Ryzen™ 9 7950X3D Prozessor, G.Skill DIMM 64 GB DDR5-6000 (2x 32 GB) Dual-Kit, MSI GeForce RTX 4090 VENTUS 3X E 24G OC Grafikkarte, 2x WD Black SN850X NVMe SSD 4 TB - Drive C+D, WD Gold Enterprise Class 12 TB for storage  HDD, Thermaltake Toughpower GF3 1000W PC - Power supply, Thermalright Phantom Spirit 120 EVO CPU Aircooler with 7 Heatpipes, Design Meshify 2 White TG Clear Tint Tower-Case, 3x 4K monitors 2x32 Samsung 1x27 LG  3840x2160, Windows11 Prof. 23H2 - now Windows11 Prof. 25H2

Flightsimulator Hardware: Honeycomb Throttle Bravo, Logitech Extreme 3D Pro, Logitech Flight Joke System, XBox Controller, some Thrustmaster stuff, Winwing CDU Panels.

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on EAD you have to check for a green rectangle, then everything is ready for TO, otherwise there is noted what is wrong - here STAB TRIM, btw in the real thing you can not select a synoptic page if stab is out of trim, SD will show the ENG page instead to point you to the stab setting. Best regards

Ralf Andreas

23 hours ago, btacon said:

If you look at the V speeds page (TO/APP)  once you’ve set payload and fuel you will see the proper Stab value to set via trim prior to takeoff.

-B

solved stab value, thanks a lot. Another thing during take off the autoflight button doesn't work, i push it one time but the speed doesn't move

Edited by motishow

18 minutes ago, motishow said:

i have 5.2 stab inTO/APP page , is that a good value?

If you have W&B and Fuel computed and VSpeeds in place the Stab # given is the one the system expects and will preclude the “Stabilitator” warning.  Good luck and good flying!

-B

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