ok perhaps I didn't submit enough data, let me give an example (as given in Jeppesen manual):
Following is the formula to calcute the ACN.
This is the ACN table with data for the specific type.
Note the empty mass in the table is 160481 whereas in the example it is 157850. ACN empty corresponding to 160481 is 25 but one used in the example is 24.
So just wanted to confirm that if the aircraft you are working on has different maximum and empty masses from those that are published in the table then is it ok to determine the corresponding ACN by a linear relation.
e.g. considering the above example the empty mass of the a/c is quite close to the one published in the table, that's why ACN is just 1 less than published. What if the empty mass was 150,000 (as it actually is in many cases). Would the ACN in that case be:
150000 / 160481 = 0.93
0.93 x 25 = 23 (ACN empty)
Thanks