Honest question because I don’t know......the 789 has more positions but can it lift more than the 777?
All I have to go off of is the A.net people that says the 787 is less capable.
Is it a question of less capable, or different capability? I think the 787 might be more like a van that is more fuel efficient than a truck, and may actually be able to hold more from a volume standpoint, but the truck can hold heavier things. Also, a truck may have less fuel efficiency, but as long a range as the van, because of a larger fuel tank.
This is a tough issue to address because there are so many variables one has to consider which will effect the capability of each one of these aircraft.
If we go to the extreme meaning a cargo ferry flight UA's 77E's record was 83,362 LBS, whereas the 789 as a cargo ferry lifted a record 81,638 LBS.
On a regular every day passenger flight the record haul for UA's 77Es is 52,663, whereas the 789 on a the record haul on a passenger flight was 51,289 LBS.
On an average UA cargo heavy route our 77Es our lifting about 35,000 pounds of cargo with about 6 or 8 LD3s for bags.
On an average cargo heavy 789 route that aircraft is 32,000 pounds with 8 LD3s for bags.
Also keep in mind the 777 has a larger bulk pit so 77E the ramp can bulk two full cans of bags and about 1000 LBS of mail and not run out of room. However the 787 (entire fleet) has a much smaller bulk pit (the bulk pit is smaller than a 767 bulk pit). The ramp can bulk more items on a 777 they can not on a 787, bulking two full cans of bags on any 787 is a recipe for disaster by itself. If you add 1000 LBS of mail into the mix and you are guaranteed to leave at least one full LD3 of bags behind.