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MD-11 altitude hold

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MD-11 altitude hold

Postby Flight876 » Sun Apr 16, 2017 9:55 am

How do make the MD-11 cruse and hold at maximum cursing altitude?
Flight876
 
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Re: MD-11 altitude hold

Postby kiteflyer » Sun Apr 16, 2017 5:00 pm

Under Autopilot (set the speed, altitude and direction), click on Autoflight once you are airborne at least 400 feet AGL, and it will climb to the selected altitude and hold.

The transition from manual (joystick) flight to Autoflight is a bit tricky. Try to get a reasonable attitude (climb, bank) first and then switch on Autoflight. Even then, I find it has a tendency to climb way too fast, or sometimes it might even descend depending on the joystick input at that moment. So you will then have to click on the vertical speed button (V/S) and adjust accordingly. It can get to ridiculous 6000 feet per minute when you switch the Autoflight on.

In general, I find the Autoflight to be tricky on the MD-11. Often slow to react (so overshoot desired target, then major oscillations in correcting back), the Auto bank angle doesn't seem to work (so you get 20 degree banks at cruise speeds at high altitudes), and sometimes the system gets very slow (slow framerates / reactions) for reasons I don't understand, so it could be annoying. Autoland typically result in failure (run off the runway) because of this.

As for maximum altitude, not sure if you are asking if you can set it to the supposed 43000 feet service ceiling at cruise. I have never tried to get that high - only 37000 feet max in my flights.

One observation on the MD-11 overall - I do find it more difficult to fly than other big jets (Boeing 777, Airbus 340). I find I need high speeds on takeoff (at least 170 knts, or risk reaching the max elevator positions and never get off the ground) and also on landing (if I don't maintain 170 knts on final, I will also reach max elevator and it falls short of the runway). You also have to be careful if using the throttle manually on the approach in maintaining speed - on my joystick, just a little bit over and the plane starts accelerating beyond 190 knts.
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Re: MD-11 altitude hold

Postby Flight876 » Thu Apr 20, 2017 9:37 am

Thanks mate :) P.S I'm having troubles with the MD-10, That aircraft won't start up, any idea what's going on here?
Last edited by Johan G on Thu Apr 20, 2017 7:11 pm, edited 1 time in total.
Reason: No need to quote the entire preceding post; it is just above yours
Flight876
 
Posts: 55
Joined: Sun Apr 24, 2016 9:07 am

Re: MD-11 altitude hold

Postby kiteflyer » Sun Apr 23, 2017 1:41 am

I haven't tried that aircraft, but if you download an aircraft from some other hangar, you need to add the path to that. I had to fiddle around with it a few times to get it to appear (forgot exactly what I did to make it work).
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