Does anyone noticed the strange fuel system of PIC767, it happens in the L and R wing fuel tank, it can be found easily during long flight, it seems the right tank always burns more fuel than left tank, so i have to use the crossfeed valve to equalize the fuel value on each tank, i also checked the FMC, the fuel used value of L and R tank is actually the same, so why my R tank always burns more fuel? any idea would be appreciate~~

No one engine in the real world will have the same fuel consumption of the other. This is what seems to have been modelled in PICRgds

It is modelled correctly and realistically. As Ian said, no engines burn fuel at the same rate. Therefore, on longer flights, a significant disparity can develop between fuel in each tank.What you have to do is what real world pilots would have to do. Turn on the Crossfeed valve and shut down the right fuel pumps until the fuel levels are rought equal. Then turn fuel pumps back on and close crossfeed valve. Regardless, a little imbalance is not a problem, a big imbalance is.

but the FMC indicates that the two engines burns the same volume of fuel, does it also normal?

Yeah, having the FMC report equal burn seems like a small bug in this case.Lee Hetherington (KBED)

Actually, it is a bug that dates back to the old FS98 days of this panel. It was never determined why the right engine burns more fuel than the left. Strangely, it is one of the few bugs that actually adds realism to the sim ;-)I think it has to do with PIC's logic for switching the active fuel tank. As you are aware, FS has no fuel selector which states: "Left/Right but not Center" This logic has to be managed by the panel. Whether this involves switching between the Left and Right tanks or moving fuel from those tanks back into the Center tank as it is burned, I'm not sure - but there's likely a roundoff error running amuck somewhere.There is also a slight asymmetry to the spool up on the engines as well. Whether that was intentional or not - it does add to the realism that the pilot is, in fact, dealing with two distinct systems of hardware on the aircraft ;-)J

PS. For most flights, I usually open the X-FEED valve and turn off the right fore and aft pumps about 40nm from my T/D point to balance the fuel distribution. It doesn't take all that long to even things out.

I've helped do run-ups on a 727, and its wierd to see all the engine guages reading different things, even at idle. We've been so used to FS!!!Bryan

Just a tought...Where does APU taking his fuel ?If we fly with APU on it will burn some fuel.Jean-ClaudeCYQB

I believe it has been stated by the developers that the APU doesn't actually burn fuel in 767PIC. I think it might be difficult in FS.Lee Hetherington (KBED)

>Where does APU taking his fuel ?It takes fuel from the Left Main Tank, Jean Claude. You may notice that the "PRESS" light in PIC extinguishes in the Fwd LH Pump switch on the overhead fuel panel when the APU is running (Even thought the switch has not been selected). This AC-powered pump is automatically switched on when the APU switch is selected to ON.However, if no Main AC electrical power is available on the aircraft, a smaller, dedicated, battery-powered fuel pump is used instead of the main pump.This operation is fairly typical for Boeings. Some may even have two pumps running (in different tanks) so that the APU is less likely to run short of fuel.Cheers.Ian.

However, as Lee pointed out, while this is modelled correctly in the overhead panel, I do not believe the APU will actually consume fuel in the simulator.

>However, as Lee pointed out, while this is modelled>correctly in the overhead panel, I do not believe >the APU will actually consume fuel in the simulator. Understood, Jase... The strange thing is, tho'.... The APU won't start if the fuel tanks are dry!Cheers.Ian.***********Running a red light in a 767....http://members.ozemail.com.au/~b744er/767/GiveWay.jpg