freighters flying for 23 hours. No Way! None of todays freighters can fly any where near that distance. Take the Longest range Freighter today. The 777-200LRF. It can only flying 5800NM with full load. Assuming an average speed of 450knots. Thats still only 13 hours.
I am sure airbus can easily make a A380 airframe that can easily do LHR , SYD... but soo much space and weight will be taken up by Jet-A that it won't be economically viable.
As for the fuel cost per seat mile for the 7E7 As for cost per seat mile. I suspect that the A-380 will be the cheapest.
Assume a passenger is 210lb each..
A380 can fly 555 of these passengers 8000NM
MTOW = 1,235,000lb
Load = 555pax x 210 = 116,500lb
OEW = 608,400
The fuel load of such a trip will be.
MTOW -Load - OEW = 510,100lb of Jet A.
Assumming Jet desnity = 6.7lb / gallon, Thats 76,134 Gallons of Jet A
Lets take the 787-800 , it can fly 224 passenger 8500nm (
www.boeing.com)
MTOW = 480,000 LB (
www.boeing.com)
Load = 223pax x 210 = 46,800lb
OEW = 185,000Lb
Assumes 20% weight saving on 767-400ER (764ER is 227,000 from
www.boeing.com)
Fuel load will be :
MTOW - load - OEW = 248,200lb of fuel
That is 37,044 Gallons of Jet A.
A380
76,134 / 8000 / 555 = 0.0171 gallons per seat mile
B787-800
So the fuel per seat mile = 37,044 / 8500 / 223 = 0.0195 gallons per seat mile.
i.e. the A380 uses 0.0171/0.0195 *100 = 13% less fuel per seat mile than the 787-800
The B787-800 is not 20 % more efficent..infact, With these set of numbers, it will uses 13% more fuel than a A380 per seat mile
Saying that. lets add the A332 Figures in
Airbus A330-200 range is 6750NM with max pax
MTOW = 513,000
OEW = 268,000lb
Load = 253 x 210 = 53130lb
fuel = 191870 lb or 28637 gallons.
A332 works out to about .0167 gallon per seat mile...but remember for 6750 NM
Ah, add 772LR too
Range with 301 Pax is 9420NM
MTOW = 760,000lb
OEW = 320,000 lb
Load = 301 x 210 = 63210lb
fuel = 53440 gallons.
53440 / 9420 /301 = 0.0188 Gallons per seat mile.
A345 Range 9000NM , 313 seats
MTOW = 840,000lb
OEW = 385,000lb
Load = 313 x 210 = 65730lb
fuel = 58100 gallons
58100/ 9000/313 = 0.0206 Gallons per seat mile.
As you can see. For C market ranges. the A380 leads the way in cost per seat mile.