I recently asked my beoing mechanic buddy about the same thing
Aside from what the wings hold there is a large tank that runs the length of the aircraft in the very bottom
I told him the amount of fuel just doesn’t seem right
Personally I think the number of gallons is probably the weight of the fuel as it is measured in weight not gallons
Jet engines at proper air intake and other conditions are actually quite fuel efficient
Servant, Christ follower, diligent Truth seeker, lover of people
The wings and horizontal stabilizer are designed to hold fuel; they are hollow cavities.
The horizontal (tail) stabilizer of the Boeing 747-400 contains a fuel tank with a capacity of 3,300 U.S. gallons, which is equivalent to approximately 440 cubic feet.
This tank allows the aircraft to fly an additional 350 nautical miles.
Regarding the wing fuel capacity, the provided context does not specify the volume of fuel tanks within the wings in cubic feet. However, the total fuel capacity of the 747-400 is noted to be 48,445 gallons with the stabilizer tank accounting for 3,300 gallons of that total.
