When editing your aircraft profile, select the Weight and balance Tab.  Select fuel the Edit. A pop up window opens and in that window you can define the moment arm and capacity.


The fuel for any individual flight can be adjusted in the W&B window.  Double click on the fuel value to edit it.




George E A Reid

Ipad Mini 5,  IOS 14.4,  SD 3.15.0.288
PC(Win 10, Version 19041.804)  SD 3.15.0.0

I am struggling to see where to insert total fuel capacity when I set up my aircraft properties, I then end up with the right hand column in red telling me I do not have enough fuel for the planned flight.