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WacUK

MD11 Braking

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Hello,I'm currently having a problem with the MD11 (FSX), every time I land I can't seem to slow down fast enough and always end up over running the runway. :(I'm usually doing about 80-90 knots once I reach the end of the runway, not sure why this is happening as I am following the tutorial.Could someone please let me know what the landing procedure is so I know I'm not doing anything obviously wrong, like when to disengage the auto pilot, this is for a dual land btw. Thanks. :(

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Adam,This is how I do it...The MD-11's approach speed is typically greater than 150kts, which can make braking difficult if the final approach segment is not "spot on". You should look to cross the runway threshold at VREF+Wind Correction (this information is found in the TO/APPR page of the MCDU) and 50ft AGL. Leave the ATS engaged even if you choose to fly the approach by hand. The ATS will retard thrust at approximately 50ft AGL. I look to touchdown at the 1,000ft marker. On shorter runways I sometimes have to "plant" the aircraft to ensure I don't float down the runway. Autobrakes and spoilers will engage once the main gear touches. I wait to engage reverse thrust until my nosewheel has come to rest- although I have seen video which shows use of reverse thrust prior to the nosewheel touching down. Reverse thrust disengage at 80kts and manual braking at 60kts.I would also love to read how others do it.JW

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What Adam said. I would add "arm" the reverse thrusters the moment you touch down.My landing experience with the MD11 has been nothing like landing the PMDG 747. I'm stretching this a bit, but I could put the 747 on a postage stamp. With the MD11 I take the final approach like I do takeoffs -praying ..er paying close attention to rnwy length, head wind and most importantly landing weight.edit in: I read somewhere where a pilot said something like, ""one must not be afraid to ruff up the passengers a bit to ensure a safe landing."""

Adam,This is how I do it...The MD-11's approach speed is typically greater than 150kts, which can make braking difficult if the final approach segment is not "spot on". You should look to cross the runway threshold at VREF+Wind Correction (this information is found in the TO/APPR page of the MCDU) and 50ft AGL. Leave the ATS engaged even if you choose to fly the approach by hand. The ATS will retard thrust at approximately 50ft AGL. I look to touchdown at the 1,000ft marker. On shorter runways I sometimes have to "plant" the aircraft to ensure I don't float down the runway. Autobrakes and spoilers will engage once the main gear touches. I wait to engage reverse thrust until my nosewheel has come to rest- although I have seen video which shows use of reverse thrust prior to the nosewheel touching down. Reverse thrust disengage at 80kts and manual braking at 60kts.I would also love to read how others do it.JW

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Thanks for the reply, do you keep autopilot engaged during the whole of the landing, or should this be disengaged as soon as reverse thrust is engaged?I'm just curious if it's because I leave the AP engaged that I have difficulty stopping. :(

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Adam,I almost always hand fly the approach- unless weather prohibits. However, during full autoland I will typically D/C the A/F system after my nodewheel is down. Somebody might be able to chime in with the correct procedures on this...?JW

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I almost always hand fly the approach- unless weather prohibits. However, during full autoland I will typically D/C the A/F system after my nodewheel is down. Somebody might be able to chime in with the correct procedures on this...?
Full autoland is usually done in a low visibility environment. That means it is best to leave the autopilot engaged until the lights for the runway exit are in sight. There's no hurry to disengage the AP since all it does is to keep the aircraft on the runway's centre line.If you auto-land in good visibility keep the autopilot engaged until after nose-wheel touchdown.Regards,Markus

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Thanks for the responses.I'm still having problems braking so I guess I'm gonna have to wait for the advanced tutorial (it can't be long now), maybe that will shed some light on what I'm doing wrong.Thanks again.

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Let me ask the obviousDo the brakes work? When you press the brake button (default "/") does the "brake" message show up on the bottom left hand side of the screen? or are we purely talking about auto-brakes not engaging here?

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Do the brakes work? When you press the brake button (default "/") does the "brake" message show up on the bottom left hand side of the screen? or are we purely talking about auto-brakes not engaging here?
Thanks for the response.I use CH Pedals, so I'm using the toe brakes and I do see the word BRAKE in red at the bottom of the screen when I use them. As for the auto brake, that is set as the tutorial, I use the tutorial for all my flights, I just change the flight plan/fuel etc for where I wish to fly from/to.

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Assuming autobrakes engage normally at touch down you could also try the

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Adam,that option won't really make the difference between staying on the runway and overshooting the end. It's not like an arresting cable on an aircraft carrier ;)For some reason ABS is not working for you as it should and I'm afraid the advanced tutorial won't help you there. There's nothing you haven't done already if you're flying according to the basic tutorial. You arm ABS while on approach, you flare, engines go to idle, touchdown and ABS should start braking with a slight delay while the nose wheel is still in the air. That's it, nothing more nothing less for the inputs and clicks.Confirm you do NOT get an amber 'ABS DISARM' light on the glareshield panel?Regards,Markus

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Confirm you do NOT get an amber 'ABS DISARM' light on the glareshield panel?
Markus,I'll check this out tonight, I'm starting to wonder now if the engines are going to idle.I'll come back to you, thanks for your time.

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Don't forget the 'ABS DISARM' amber light should come on when you apply your toe brakes but not before. Throttles not going to idle could be a problem, but then you wouldn't get reversers either.

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Maybe a stupid piece of advice, but do you pull down the throttles before you reach the touchdown (if you use some throttle device)?

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Throttles not going to idle could be a problem, but then you wouldn't get reversers either.
Well reverse thrust is activating so they must be going to idle.
Maybe a stupid piece of advice, but do you pull down the throttles before you reach the touchdown (if you use some throttle device)?
Yes, I use a CH Yoke. I always pull the throttle back to zero during the approach.Thanks for the suggestions guys. :(

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Confirm you do NOT get an amber 'ABS DISARM' light on the glareshield panel?
Okay, I can confirm that the amber 'ABS DISARM' light does indeed light up as soon as the main gear touches the runway.Any idea what may be causing this? :(

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Hmm my thoery is somehow its conflicting with your CH pedals and when the gear touch down somehow the sim thinks you are using the toe brakes and shuts off the auto brake system, so unless you manually press brakes you are really just slowing on reversers and airbrakes.Maybe your toe brakes are applied ever so slightly by default?

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Maybe your toe brakes are applied ever so slightly by default?
I will check, but I do have quite a big null zone on all axis on my pedals so I doubt it's that.I'll have a go at landing without putting my feet on the pedals.

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Hello,Does anyone know how the MD11's FMC would be setup if you were doing landing training?What I'm looking to do is take off from EGAA (Belfast, Ireland) and then turn 180 degrees and then land again at the same airport.If I just put the departure and destination airport in th FMC (EGAA), I find that I am unable to tell the FMC during flight which runway I am going to land on, I was only able to tune into the ruunway via the RAD/NAV page.I know this is not standard procedure in real life, but it would help as a training aid.Thanks. :(

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Adam,You would program the FMC in the same way as you would with any other flight, in this case EGAA/EGAA. You need to select a departure runway by making a lateral revision next to EGAA. You can then select your arrival runway by making a lateral revision next to the second entry for EGAA. You can choose to stay in the circuit, or fly the approach from the IAF or transition waypoint. Jeffrey L. Whitaker

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Adam,You would program the FMC in the same way as you would with any other flight, in this case EGAA/EGAA. You need to select a departure runway by making a lateral revision next to EGAA. You can then select your arrival runway by making a lateral revision next to the second entry for EGAA. You can choose to stay in the circuit, or fly the approach from the IAF or transition waypoint. Jeffrey L. Whitaker
Thank you, I'll give it a go. :(

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Hello guys,I'm still having difficulty getting the MD11 to brake, it seems as soon as I engage reverse thrust (F2) the 'ABS DISARM' light comes on and I end up running off the runway.I've tried this with and without my CH Pedals attached to my computer, so it can't be those.Any other thoughts would be appreciated.

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Adam,Have you installed the update for the MD-11? It is my understanding they made some changes to the ABS logic.Do you have any other buttons/axis assigned to the brakes? If so, it could be a "noisy joystick". Possibly consider calibrating.Are you leaving the ATS system engaged during landing?Jeffrey L. Whitaker

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Jeffrey,Thanks for the replies.I'm gonna reinstall it from scratch and see if that helps, I have noticed a few problems such as the dome light only works when the engines have been started, before patching I could use them whenever.I'll let you know how I get on.

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