Convert %MAC to INDEX UNITS

[Dadanawa]

Formula.

Hi Pete,

For the 737-400 in pounds.

Arm = 648.5 + (65000 x (DOI - 40)/ Wt).

%MAC = (Arm - 625.6) /1.345

DOI = (Wt x (((%MAC x 1.345)+625.6) - 648.5) / 65000) + 40.

If you have the formulas for Arm and %MAC for the 767, you can substitute their numbers.

Hope this helps.