B777-300 and 777-200ER additional strengthening to increase the MTOW.
The baseline 777-200 MTOW was up to 535,000lb
777-300 and 777-200ER have MTOWs of 660,000lb and 635,000lb
Both the 773 and 772ER have center fuel tanks and fuel capacity increased from 31,000 gallons ot 45,000 gallons.
777-300
773 can carry 368 pax 5955NM
MTOW =660,000lb
OEW = 347,800lb
Load = 368 x 210 = 77280lb
Fuel = 235,000lb = 35062 Gallons.
Fuel per seat mile = 0.0160 Gallons per seat mile.
The 777-300 is structrally limited. If you fill all 368 seats on one, you can only fill in 77% of the fuel tank. (35000 out of 45000)
777-300ER
The interesting bit is putting the 777-300ER into the equation. The 777-300 ER can carry 365 pax 7880 NM
MTOW = 775,000lb
OEW = 370,000lb
Load = 365 x 210 = 76,650lb
Fuel = 47890 gal
Fuel per seat mile = 0.0167 Gallons per seat mile.
The Range increase on the 777-300ER is mainly due to the fact the the 777-300ER airframe could now be loaded an flown with a full pax load and a 100% full gas tank. (well the gas tank got bigger by 2000 gallons only.)
A340-600 HGW
Ah, Since we did the 773ER, we must do the A340-600 too
Range with 380 pax is 7900NM (up from 7500 on the original A346.
MTOW = 837,000lb
OEW = 400,000lb
Load = 380 x 210 = 79,800lb
Fuel = 357,200lb = 53,300 Gallons of Jet A
Fuel per seat mile = 0.0178 Gallons per seat mile.
A340 and 772ER
Ah we got into A340....so the good old A340-300 vs 772ER debate
A340-300E
Can carry 295 Pax 7400NM
MTOW = 609,000lb
OEW = 288,000lb
Load = 295 x 210 = 61950lb
Fuel = 37153 Gallons
Fuel cost per seat mile = 0.017 Gallons per seat mile
B777-200ER
Can carry 301 Pax 7730 NM
MTOW = 635,000
OEW = 299,000lb
Load = 301 x 210 = 63,210lb
Fuel = 40713 gallons
Fuel cost per seat mile = 0.0174 Gallons
With the above estimates, we can say fuel burn wise, the A343 and 772 ER are pretty similar. The A340 however has less than stellar takeoff performance and climb performance and as a results suffered from more Takeoff weight restrictions which reduced payload and range.
What about low cost ?
lets take a look at the seat cost on the work horse of a typical LLC fleet. The 737-800
It can take 189 pax 3383 NM
MTOW = 174,200lb
OEW= 91,300lb
Load = 189 x 210 = 39690lb
Fuel= 43210 lb = 6446 Gallons
Fuel per seat mile= 0.0101 gallons per seat mile.
I wonder why the low cost model won't work on long haul ? Simple, becoz with long haul A/C, alot of fuel will be used to carry tons of jet fuel around.
[Q]THe B787-8 is smaller than the A330-200, but it will have about the same cargo capacity of the A330-200.[/Q]
B7E7
The 7E7 is shorter but wider. 4M less length will lead to the loss of about 4 LD3 containers.
Length = 56 M
Span = 60 M
Cross section = 5.74m
A332
Lenth = 59M
Span = 60M
Cross section = 5.64M ..
Okay the 787-800 is slightly smaller. About 2 to 3 % smaller.
Okay, you think 180,000lb is too light.. Lets say, its the same weight as the 767-400 then..
230,000lb
the 787-800 can carry 223 pax
MTOW =480,000lb
OEW = 227,000lb
Load = 223 x 210 = 46,830 lb
Fuel = 203,100lb = 30,700 Gallons.
Fuel per seat mile = 0.0159 gallons per seat mile.