Hello,
In first time, my appologize for my poor english.
I am french And I search formula about % Mac.
i find this formula :
% MAC = 100* C*(LIZFW - K) /(ZFW*Chord) +
100*(Harm- Harm25%)/Chord
For A320 Aircraft:
C = 1000
K= 50
Chord=4,1935m
Harm=17,8015m
Harm25%=18,850m
But this formula is good in some case and false in other, some examples
AirCraftA320A330A320A320A320A320A320
Chord4,19357,274,19354,19354,19354,19354,1935
ZFI27,6112,828,1363,5530,6149,652,4
ZFW479301582635402956006553045462156870
K501005050505050
C1000250010001000100010001000
Harm17,801531,3417,801517,801517,801517,801517,8015
H2518,8533,1618,8518,8518,8518,8518,85%Mac Compute13,827,815,330,7716,6424,8226,00real
Value in loadsheet28,327,830,1730,7735,623235,6
Have you got an explication for this differences
Thank you
best regards