On my 8 hour flight today I took off with 56 tons of fuel and arrived with 28.2 tons fuel left.
That’s 27.8 tons used for 8 hours in the air at M0.80 and step climbs FL320/340/360.
So on arrival I had roughly enough fuel for the 8hr return without refueling (reserves aside - but I could have taken even 4 tons of fuel more with me).
That’s 15,5 to 16 hours air time with a full fuel tank and about 13 tons payload.
That feels too long for the A310, I guess it should require more fuel per hour, without having real life data.
In Simbrief the calculated fuel burn was way higher and the full fuel range limit shown in Simbrief seems closer to real world operations.
Any insights or comments here?
BUT the calculated EFOB in the FMC was absolutely spot on during the whole flight!