FSXstudent,
mutt is correct when he says it is a starting point for the final calculations. Remember that you never know how much fuel you will be landing with, whilst it is unlikely(but has happened) that you will land with no fuel, it is not uncommon for a 570 ton A380 to land with 7 tons of fuel. Therefore, it is imperative that the GC be within range for any and all fuel states, including empty.
There are further factors, such as ZFW & ZFWCG comes from load control and has very little to do with the pilots......I don't load the plane.....I just need to know what the end result is. In the same vein, load control don't want to be bothered about how the fuel is loaded.....they simply want a range to keep the CG within so they can get on with their job.
If we divert, it is easy to calculate the TO CG as the ZFWCG is unchanged(although one could argue that some of the catering has shifted to the toilets).
Last edited by Kennytheking; 28th September 2012 at 14:26.