Thread: 1940 Ford Pickup

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It was my understanding that planes carried the fuel in the wings, with the tanks centered over the CG so that fuel levels don't alter the CG.

Originally Posted by firebird77clone

It was my understanding that planes carried the fuel in the wings, with the tanks centered over the CG so that fuel levels don't alter the CG.

that's what they tried to do but with the shape of the wings-and the upper being more forward than the lower, it is virtually impossible to have a fuel tank shape/location that fits the aircraft shape and stays cg neutral-----as you change the pitch in flight the fuel runs forward/backward causing CG change-the non fluid stay the same --------

As I was saying-SWEPT WING---The wings taper back from the fuselage quite a biy and as fuel levels are burnt down during the flight the CG goes forward a lot.
Also some long range a/c carry fuel in the vertical stabilizer and it has to be burnt at a certain time into flight ---adding to the CG change is also the structural loadings that require a portion of the fuel load be burnt out of the forward/inner tanks to reduce leverage load on the wing tips-gets complicated-I'll try to look to see if I can find some DC10 manuals on the timing of the burn, I may have some B767 but they were simple compared to the DC10 with one tail mounted engine plus the wings

more 40 door pic's
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