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737-800 Landing weight dilema

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    737-800 Landing weight dilema

    Just a quick question, as it just feels like something is off in either my planning or expectations. For a 3-4 hour flight, im finding it very difficult to keep the landing weight below max without really keeping a fair few seats empty and not much in the hold. As im typing this im realising that the pax selected weight may be 100+kg to account for assumed baggage and thus anything i put in the cargo is additional to bags? I have been adding 15kg per pax as cargo, so maybe im filling up too much.

    How close to landing at max landing weight is typical?

    I shall dig into the relevant documentation and fmc menu to see if pax are including a baggage allowance too. But it would be very odd if this aircraft could only carry 100-130 pax

    It must be my logic when im loading thats at fault. Simbrief is what im using so i may have all my numbers wrong and i dont need to be adding "cargo" that i always think of as the pax bags.


    On a LIDO OFP weightt section is the PAX number giving an assumed baggage allowance for each passenger? And is the CARGO section just for say some freight unconnected to the pax, as i know they do move freight this way?

    Loads of questions in one here! lol
    Peter Lott

    #2
    It appears the 737 uses a passenger weight of 190 pounds. I think the 747 used 195 pounds. In any event, I always added passenger bags as cargo. I don't know what numbers Simbrief is using.
    Captain Kevin

    Kevin Yang

    Comment


      #3
      The default passenger weight on SimBrief is 104kg. This is made up of 85kg for the assumed weight of a passenger plus 19kg for baggage.

      You can (and I do) customise this if you set-up an aircraft profile!
      Paul Parkin

      Comment


        #4
        I think I'm going to have to dig into all the numbers and get my head around what's counting what. I usually set pax and add bags in simbrief and then just punch the resulting ZFW into the NGXu. Somewhere along the line I'm ending up too heavy.
        Peter Lott

        Comment


          #5
          Hmmmm, Now im intrigued...

          Why is the EFB giving me Landing weight and Takeoff weight as the same.... Lockheed Martin® Prepar3D® v4 15_11_2019 18_39_17.png


          EDIT I had forgot to add taxi and trip burn on the fuel section, thats why i erroneously thought i was over MLAW and i actually wasnt.

          Just goes to show how crucial it is that all your paperwork matches!!
          Last edited by Petetech; 15Nov2019, 19:46.
          Peter Lott

          Comment


            #6
            Are you loading block fuel or full fuel?
            ​​​​​​

            Comment


            • Petetech
              Petetech commented
              Editing a comment
              I load the block fuel from the OFP, And the OFP i usually generate based on the VA output. But to be honest, i think i have solved it in the NGXu. I was seeing in the EFB that i was always coming out over MLW, and assuming the numbers were wrong from my OFP as i usually let the VA im flying for generate the payload. Sometimes it meshes incorrectly with however i have simbrief set up, so if i change to my edited aircraft, the numbers are wrong and so i usually just infill as required and load the NGXu according to OFP numbers. What i didnt realise is on the EFB, you have to enter your estimated fuel burn for it to correctly calculate your weights. I was assuming "fetch from fmc" was doing that, and not noticing that the landing weight was just a duplicate of the gross weight at that time, then i was trimming ZFW to try to bring it in line thinking it was my paperwork that was wrong, until i took the gross below the MLW. See how mixed up i got haha
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