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Problem landing!

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    Problem landing!

    Hi all

    I have been flying the PMDG 737 NGXU on P3Dv5 and previously for many years on FSX. I have no idea why recently I seem to float and almost bounce a couple of times before landing. My approach and line up on the runway is almost always spot on regardless of conditions. The approach speeds are accurate, I disengage the auto throttle and auto pilot at about 1000 ft and hand fly the approach and at approx 30ft I slowly reduce throttle to idle and commence to flare the aircraft. All looks great and then the plane seems to just want to lift and float. My first reaction is to trim down and almost force the aircraft to land. Any suggestions to assist would be appreciated I am starting to feel like a rookie again 🙄

    Alex Schiavo

    #2
    Do not trim aircraft during takeoff or landing since it will most likely result in tailstrike.

    Regarding your flare. I guess you are pitching up too aggresivly/too much. At max you should increase pitch by 2-3 degrees
    Also, do not try to grease landing, firm touchdown is also a good landing!

    My suspicion is that you're used to airbus where aircraft trims nose down during flare.
    Matthew Chalupniczak

    Comment


    • Alex_S
      Alex_S commented
      Editing a comment
      Thanks Mathew. I will certainly stop the trimming on touchdown!

    #3
    Make sure you didn't reduce the descend rate until 30, it's very likely for someone to subconsciously start to pre-flare at 50'
    If the airplane float, hold the attitude, if it could get down at TDZ, it's fine, but if you float beyound 3000feet or 1/3 of the runway, go-around.
    ZHU Hai
    B737 Ground instructor

    Comment


    • Alex_S
      Alex_S commented
      Editing a comment
      Good point Zhu I have become an expert at going around!

    #4
    Originally posted by Alex_S View Post
    Hi all

    I have been flying the PMDG 737 NGXU on P3Dv5 and previously for many years on FSX. I have no idea why recently I seem to float and almost bounce a couple of times before landing. My approach and line up on the runway is almost always spot on regardless of conditions. The approach speeds are accurate, I disengage the auto throttle and auto pilot at about 1000 ft and hand fly the approach and at approx 30ft I slowly reduce throttle to idle and commence to flare the aircraft. All looks great and then the plane seems to just want to lift and float. My first reaction is to trim down and almost force the aircraft to land. Any suggestions to assist would be appreciated I am starting to feel like a rookie again 🙄
    I find many addon developers place the glideslop and PAPI and bit too far to the back of the runway. Many make the PAPI/GS to end exactly on the aiming point. That does not allow for a flare.
    What I tend to do on sceneries where I can see that the GS will bring me exactly onto the aiming point (thus not allowing for a flare) is to go slighly below the glide at around 100ft-50ft, depending on how much offset it is.

    Alright, this much about putting her on the aiming point.

    Next the technique itself: Many people, especially flight simmers, tend to try to absolutely grease that landing (and fail miserably when the colleague calls go around) by trying to hold the airplane off the ground until it finally touches the ground. This is exactly what the FCTM will tell you NOT to do.
    For training puposes: Start by flying it onto the runway, on purpose harder than you'd "want" to do it, the only objective at this point should be to "crash" into the aiming point. With most sceneries you should be able to do this perfectly by just not flaring.
    That gives you an idea of where exactly the plane is going.
    Once you can hit the spot on the runway you'd like to hit try to come in just a tiny bit lower and bring in a gradual flare. Not more than 1-2° of nose up input. That's all you need for the flare to arrest the descentrate.
    Now you can work yourself towards a controlled impact, still at the aiming point, but with the ability to re-use the airplane.
    Once you can do that you can try to come in even a bit more shallow, to finally get it down to a good rate of descent. But beware, the aim is NOT to hold it off the runway until it touches down by itself - you can do that in a 172, do it in a 737 and you'll greet the fence on the other side of the runway

    It might take some 20 landings to get that right. Perhabs even more.
    AND: Don't try to do it all in one. Do it in steps. Practice the first step on the first day. Once you think you can make it -. cook your wife some nice dinner or ask her out if conditions in your country permit.
    Next day: Repeat day 1 until you're able to get it down onto the aiming point with certainty.
    Day 3: Start with the next step. Repeat the above until you can get it right.

    Disclaimer: DO NOT DO THIS IN A REAL AIRCRAFT! Your insurance will love you!

    Comment


    • Alex_S
      Alex_S commented
      Editing a comment
      Thanks EMI great feedback I will try it tonight and practice your suggested techniques. Restrictions have finally eased in Melbourne Australia which means I can definitely take my wife out to dinner once I manage a successful landing!

    #5
    one possibility is to carefully monitor its rate of descent and dose your flare accordingly ; I know this is not realistic but the simulation does not reproduce the feeling of G that a pilot feels
    Cedrice Rive

    Comment


    • DDowns
      DDowns commented
      Editing a comment
      Do not watch the V/S indicator during a landing.

    • Alex_S
      Alex_S commented
      Editing a comment
      I used to do that in FSX however the 737 back then was a little more forgiving

    • cedrice.rive@yahoo.fr
      [email protected] commented
      Editing a comment
      I tried 4 or 5 landings without looking at the V / S by making a flare of 2 ° or 2.5 ° this makes a firm touch without floating however as Emi said for the target zone you have to follow a PAPI three red one white (depending on the placement in the scenery)

    #6
    This sounds like the PMDG Bounce that I experience with all three of the Boeings. The only time I don't experience it is when I land without autobrake. So it's my personal SOP to never use autobrake.
    Tony Fiore
    E175/LR60/LRJET

    Comment


      #7
      After 12 attempts at YMML tonight achieved 5 perfect landings 😁😁😁. Thanks for all the assistance guys.
      Alex Schiavo

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