Passenger numbers change

[Just Caliber]

During a recent outing, I noticed that the passenger numbers change throughout the flight. Simbrief gave me 427 passengers (max set for that specific aircraft profile (PMDG 777)). When I hit 'Reload SimBrief' in the GSX menu in-game, It said 427 passengers. Come boarding time, it only loaded 360 or so. After arriving, it only deboarded 254. Where did 173 passengers go lol.

[virtuali]

GSX will never try to board more passengers than the actual seats on the airplane so, regardless how many passengers the airplane profile on Simbrief has, when an airplane supports Seated passengers, GSX knows how many seats you have in the Cabin, so the maximum passengers number will be capped by the seats capacity in the 3d cabin.

[LosGenero]

I´we had same issue multiple times with PMDG 777. Today I boarted 338 pax at Los Angeles, in Heathrow I deboarted 257 pax. I took screencaps in Los Angeles, this is what GSX Pro set in Pax menu. Simbrief was Ok and there is 338 pax. There is something wrong. This was not first time, when passanger count changes during flight. I have set GSX Pro off in cruise setting. If you add the pax count, you´ll get 257

[virtuali]

I´we had same issue multiple times with PMDG 777. Today I boarted 338 pax at Los Angeles, in Heathrow I deboarted 257 pax. I took screencaps in Los Angeles, this is what GSX Pro set in Pax menu. Simbrief was Ok and there is 338 pax. There is something wrong. This was not first time, when passanger count changes during flight. I have set GSX Pro off in cruise setting. If you add the pax count, you´ll get 257

GSX reads the passengers count from Simbrief but, if the airplane code has reset it, it will trust the airplane. Have you used the PMDG EFB ? If yes, the passengers number might have been changed by the PMDG EFB. Try using just GSX, and see if the number stays.

This of course keeping in mind GSX will never board more passengers than seats (390) so, you'll never see 427 passengers.

[LosGenero]

Hello.  I have set my max pax count in Simbrief to 370, which is the PMDG 777 capacity. I´m using "Awemeter" profile as an base, I´we changed weight´s a bit to match reality. Pax weight is set to 84 kg and luggage weight to 14 kg.

I´ll let GSX Pro to handle boarding, fueling and deboarding of the aircraft, because I like what GSX does. Maybe the issue is this, PMDG has three class configuration by default. First Class 12 seats, Business Class 42 seats and Economy Class 315 seats. GSX Pro only regonizes two class configuration and in this case it set´s pax amount via ZFW, which it takes from Simbrief. This is from GSX Manual PMDG section page 114:

"By Pax/Payload method
This is a method that assumes a standard airplane profile for the PMDG has been
used on Simbrief (we tested the ones made by Awemeter), which sets the passenger
weight to be 190 lbs (86.2 kg). and this should ensure that Pax number,
Cargo and ZFW will all match Simbrief.
GSX will recognize if the current airframe is set to use a Dual or Single class configuration,
but since Simbrief only returns a single figure for the number of passengers,
it will randomly split passengers between the two classes, respecting the
limits for each one as setup by PMDG for each supported variant.
Cargo will be set according to Simbrief Cargo value, and will be distributed between
FWD and AFT using the same rules normally used by PMDG for each variant.
However, if the number of passengers planned on Simbrief would exceed the
maximum allowed by PMDG, GSX will switch to set the Payload by ZFW instead."

So basicly GSX Pro is doing what it is suppose to do, it takes pax amount correctly, in my case 338, but because of the planes three class configuration, it set´s pax amount via ZFW. If you calculate 338x84 kg = 28392kg and luggage 338x14 = 4732 plus 15000 tons of freight. Payload is 48124 kg´s and addted to empty weight 168591 kg  total ZFW is 216715 kg, which equals 257 passengers. But this is fine by me, because I usually use British Airways livery by "Atarium" and in reality BA 777-300ER has two configurations, one is 256 passengers and other 299 passengers. I´ll just change max pax amount to 257 and this issue should be fine


EDIT

I calculated what is set in PMDG 777 as default weight of one passenger. It is 86,21 kilos. So I´ll have to change it on Simbrief

[virtuali]

I calculated what is set in PMDG 777 as default weight of one passenger. It is 86,21 kilos. So I´ll have to change it on Simbrief

It's 86.182550 kgs, to be exact, which equals to 190 lbs. GSX will switch to use the "by ZFW" method, if the passenger weight in the Simbrief profile differs from the one used by PMDG by more than 2 lbs (0.9 kgs)

[LosGenero]

The issue here was PAX weight, I set it to 86 kg and GSX Pro set correct amount into FMC 338. So everybody, who has had this issue, check your Simbrief passenger weights. By default it is 79 kg (174 lbs) and change it to 86 kg (190 lbs). Simbrief is not perfect, it has it´s own flaws, but it is still a good planning tool. As for weights an Youtuber called "A330 Driver" has made a good video of it. Check him out.