Fuel weight 0x1264 and 0x126C differs from in-sim fuel weight

[kaha]

For some aircraft the values I get from those offsets are lower than in the in-sim EFB. I found this to be the case in the Carenado C172. I then searched for a standard aircraft and found the same for the DHC-2 Beaver. In the Carenado 182RG, as an example, the values are the same.

This is a list of loaded fuel / fuel I get from offset 0x1264 (gallons):

100%  95 / 92

50%  48 / 44

10%  10 / 6

I'm at a loss here. I read using ipc.readUD(0x1264).

Karl

[kaha]

MSFS2024

[John Dowson]

0x1264 holds the FUEL TOTAL CAPACITY. From the MSFS documentation:

Quote

Current total quantity of fuel in volume for all tanks of the aircraft. The actual returned value will depend on the fuel system being used:

1. Legacy fuel system [FUEL]: The value will include any unusable fuel.
2. Modular fuel system [FUEL_SYSTEM]: The value will not include any unuseable fuel.

This can be checked using the NEW FUEL SYSTEM SimVar.

Maybe the aircraft is using the new Modular fuel system and the value does not include any unuseable fuel?

If you want the total fuel capacity including unuseable fuel, you can use the simvar FUEL TOTAL QUANTITY EX1:

Quote

Current total quantity of fuel - including any unuseable fuel - for all tanks of the aircraft, regardless of the fuel system being used.

This is not currently added to any FSUIPC7 offset - you can add it yourself to a free/spare offset if you want to use this.

 

[kaha]

Thank you, I'll try this.