Stitch wrote:kitplane01 wrote:I think the 777F can do everything the 747-8 can do (except nose loading, which is rare and there are already enough planes around to do that). Now it might take 1.3 777's to replace a 747-8 ...
Well a 747-8 will lift 30,000kg / 200 cubic meters more payload so it can generate a fair bit more revenue per flight.
And if you need three 777Fs to carry the load of two 747-8Fs, well there goes any efficiency advantage of the 777F had. Boeing's own marketing gives the 747-8 a 2% better operating cost advantage than the 777F, but that does take into account the 30% greater lifting capacity of the 747-8.
And it also depends on the range that is needed. Extra range capability means higher zero fuel weight to enable the the plane to carry more fuel to fly further. UPS would rather stop over at ANC with a 748F than fly nonstop from China on a 777F. Given their role as a package carrier, they need more volume than weight capacity, because their freight is less dense. Considering they had the chance to buy either the 748F or the 777F indicates that the 748F numbers work better for their business model.