Side Forces in FS9


Sideforce :  FAy = CY*Q*S (compare here )

Cy = CYo + CY_da*da + Cy_beta*beta + Cy_d*dr + Cy_p + Cy_r

Lineup and designation as given in .air-file.

Values for dimensionless sideforce coefficients from FS9-.air-files and real-life sources below

Q = free-stream dynamic pressure
S = Reference Aera
da = Aileron Deflection
dr = Rudder Deflection

[aircraft_geometrty] section in aircraft.cfg


Side Force Coefficients
as listed and designated
in AAM [1]		 air-file 
Boeing
737
 air-file 
Boeing
737 [4]
"FSEdit"		 air-file 
Boeing
737[4]
Modified 		air-file
Boeing
747		 Real
Boeing
747 [5]
Cruise low		 air-file
Cessna
172		 Real 
Cessna
172 [5]		 air-file
Cessna
172 [4]
"FSEdit"
CY_0  [2] -  -   -  - - - - -
CY_da      Side Force Aileron   0         -    !   0   0 0 0   0         -  !
CY_beta  Side F. Sideslip Angle - 0.516 - 0.652 - 0.051  - 0.773 - 0.90 - 0,399 - 0.31 -  0.315
CY_dr      Side Force Rudder - 0.158 - 0.313 - 0.919  - 0.147 + 0.12 - 0.200 + 0.187 - 0.151
CY_p       Side Force Roll Rate   0 + 0.146   0 + 0.154   0 + 0.042 ! - 0.37 + 0.033
CY_r       Side Force Yaw Rate   0 + 0.073   0 + 0   0 + 0.048 ! + 0.21 + 0.031

[1] AAM here

[2] Equal to zero for symetrical airplanes

[3] New values for derivatives generated in the .air-file after running through FSEdit (SDK, FS9), after increasing empty weight by 1 lb and saving. 

[4] To simulate an extreme resultant sideforce against rudder input as has been reported from the PMDG 737NG v.1.2

[5] Roskam, Jan Airplane Flight Dynamics and Automatic Flight Control Part 1 Lawrence, Kansas: DARC, 1995
     ( Similar data can also be found in NASA CR-2144 (1972), Heffley, Robert K., Wayne F. Jewell, AircratHandling Qaualities Data)