Hello,
I usually fly the B777F and was wondering about the random payload level distribution.
I would assume that the current random cargo level model is based on a normal distribution?
Whatever it is, I didn’t get the maximum 777 profile (set to 103.6t) payload a single time in my last 40 flights. About 95t is the maximum. From the YouTube cockpit videos I watch it definitely occurs that a cargo aircraft is loaded to 100%.
Sadly I don’t have exact values but maybe it’s possible to adjust this distribution for cargo flights.
Thanks.
Just out of curiosity, how long are your flights usually?
Most of the time 40 mins to 3 hours, never more than 6 hours
Hello, it may be useful to set your own freight numbers. SB will calculate different loads at different times of day. Try messing with the time of departure.
I measured that now and also here: not a single time above 100t.
Also in high peaks I wasn’t able to get > 100t
And yes I could set my own cargo weight but I’m here to improve SimBrief and it would be great to get a fix for this.
I would be very interested in getting @dougsnow 's insight into this. 
How often are cargo aircraft loaded right up to MZFW? And what is the average payload on cargo flights, does it swing wildly between empty and full, or is it fairly consistent?
Cheers,
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I am no Doug Snow, but I was a flight dispatcher for cargo airline and a loadcontroller, and it wasn’t that common that our aircraft (747s and 737s) were filled to the brim(mzfw), they were maybe 80-85% full(weight vs volume and all that)
Most often, they were full to what we could carry on that sector(more often than not limited by Mtow)
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Up to true structural MZFW - rare. Usually I am bumping up against the MLW + Burn. Sometimes we are MZFW imited, sort of. If I know I can lift only 750.0 off the runway (struct MTOW is 766.0), but I am carrying 290.0 on the gas, my new MZFW is only 460.0. Struct MZFW is 575.0.
We usually volume out yes before we weight out, usually. We fly flower charters out of Ecuador a lot, and we are told to give them an MZFW flight plan, knowing all too well that flowers will volume out long before we hit a weight limit. If they still have room, there is a flower warehouse right at the airport.
Nothing is consistent as a freight dog.
Interesting, for the 777F I use a MZFW of 248.115kg and a MLAW of 260.816kg…
So a fully loaded 777 (248.115kg) could arrive with 12.701kg fuel (which seems quite normal to me) and would be exact on MLAW limit. Of course it might need a buffer but I would assume that a cargo level > 100t should be at least possible “some times”.
Yesterday I spend a bit of time to analyze 5 to 6 (didn’t found more) videos and I have to admit that at least in these videos (mostly LH Cargo & Aerologic/DHL), 100t where not exceeded (around 95t where the maximum). One flight even had 55t. (Nevertheless the 106t video I saw was from a LH Cargo 777).
So all in all I would conclude, that the (if it’s normal distributed) “expected value” and the “variance” is in a realistic range. Since I spotted these 55t and 106t I would just increase the variance “a bit”. This should result in rare max cargo payload, “a bit more” > 100t payload and “a bit more” < 60t payload.
