Hello guys. I looked to some simmilar topics here and didn't come up with exact values that PMDG using for their NGX planes.I really wan't to come up with all of the values, so no more questions will be asked.All I want to know (for all 600-900):-Operational Empty Weights-Max Payload (Max cargo and weight of one PAX)-Max Take-Off Weights-Max Landing WeightsVery appreciated if someone from PMDG team will post them.

You can find on the FCOMV1 in the chapter L page (51) on the PDF version, you will find every thing as you describe.

You can find on the FCOMV1 in the chapter L page (51) on the PDF version, you will find every thing as you describe.

Cmon...They don't match at all. You can't fly with those values...

You can't fly with those values...

What makes you think so?

What makes you think so?

First of all, there is no dry operating weight and max payload. These values varies in each aircraft, cause there could be one more seat or something else which causes dry operation weight. Thats why I asked PMDG to respond.Secondly other values very different. Try to load 1000kg above Max values from FCOM, and you wont get yellow warning in FMC. On 737-700 by experementing in FMC i got some values like this. They arent exactly accurate:-Dry 37600-MZFW 54600-MTOW 69600-MLW 58000While in FCOM you given:-MWFW 54657-MTOW 60327-MLW 58059

cause there could be one more seat or something else which causes dry operation weight.

Fair enough for DOM.

Secondly other values very different. Try to load 1000kg above Max values from FCOM, and you wont get yellow warning in FMC.

MZFM, MTOM, MLM, are subject for certification. They do change a bit over the course of life of a type, but not too much. It is not a question "which did PMDG select".Good point about bad weights in FCOM, those DO seem strange, even for a "typical option". You can look up figures up on Boeing website - http://www.boeing.com/commercial/737family/pf/pf_600tech.html

As you say this question keeps getting asked, but never answered

As you say this question keeps getting asked, but never answered

Yes. Very strange. It's not a top secret thing.

Maximum weights are not based on engineering, but certification by the local safety authority. To get certified for a higher weight, I would assume that more testing would be involved - and of course, you pay for that. If you don't need it, you don't pay for it and you get a lower "maximum" weight in your flight manual.I would doubt that FMC max weights would neccesarily match each aircraft's certified limitations. These are likely to be the engineering maximums and the same ones put on all aircraft to save having to produce a different database for each aircraft based on certified maximums.

btw. I think user "bakaman" at one time looked up actual weights. Also there was something from Ryan about weights in Tutorial 2, in TOPCAT section.

I suppose one could check with figures given in the FMC and in the aircraft.cfg-file.For 737-800 you will get the following:DOW (Basic weight plus crew and pantry) = 91300 lbsMax Cargo = 16400 lbsMax PAX = 30500 lbs (174 off)Max Fuel = 46057 lbsMax ZFW = 138200 lbsMax TakeOff Weight = 174700 lbsMax Landing Weight = 146300 (which I took from a SAS 7383 with MTOW of 165500 lbs, so I guess this MLW figure is acceptable in the simulation.)Cheers,Bert

MLW usually stays the same when airlines opt for different MTOW.

"You can find on the FCOMV1 in the chapter L page (51) on the PDF version, you will find every thing as you describe."except DOWsSetting fuel load to "0" and payload to "empty" in each FMC of the 737 NGX models, I get the following DOWs - Dry Operating Weights :-600 : 80200 Lbs-700 WL : 83000 Lbs-800 WL : 91300 Lbs-900 WL : 94600 Lbsguess these values are correct. Just let me know

I just load my planes to ZFW. I have a weight value that I use per passenger (ie; U.S. Military charter on a Miami Air 737-800 would be 275 lbs per pax). I try to learn the ZFWs of the aircraft that my favorite airlines fly (BBJs are another story I could spend an entire thread discussing. And sadly, I don't know how much Miami Air 737-800s weigh for my example scenario, so I just guess 95,000 lbs). Then I add them together and type that into the ZFW line on the load planner in the FMC. It's all about ZFW, so the weight PMDG programmed each plane to weigh is irrelevant unless the aircraft I'm simulating flying weighs less and I'm flying it empty.-Tony

It's not a top secret thing.

Exactly. So I'm wondering why it is SO difficult to get a response regarding the weights that PMDG used when creating the models.It is definetely an obvious parameter to look up (on their part), not secret (they don't have to disclose WHICH operator they modeled after), and is obviously something that is of great interest to a majority of those that use the NGX.If there is a reason for the non-disclosure, then maybe they could at least tell us why?