#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Aircraft: # Piper Cherokee # Small single piston engine general aviation airplane # # File name: # piperCherokee-v1 # # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Authors: # # Jeff Scott # 2000/04/14 Adapted from the file cherokee_aero.c in FlightGear # developed by Gordan Sikic. The aircraft data comes from: # Gordan Sikic's cherokee_aero.c and cherokee_engine.c files # # Michael Selig # http://www.uiuc.edu/~m-selig # 2002/02/02 added gear # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Notes: # - constant stability derivatives, no nonlinear aero # - approximate gear data # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # References: # # - McCormick, B.W., "Aerodynamics, Aeronautics, and Flight Mechanics," # John Wiley and Sons, 1995. # # - Additional models and updates # http://amber.aae.uiuc.edu/~m-selig/apasim.html # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ init Dz_cg 0 geometry bw 30.0 # [ft] FG cherokee_aero.c geometry cbar 8.25 # [ft] FG cherokee_aero.c geometry Sw 157.5 # [ft^2] FG cherokee_aero.c controlSurface de 20 20 # [deg] guess for now controlSurface da 20 20 # [deg] guess for now controlSurface dr 20 20 # [deg] guess for now mass Weight 2400.0 # [lb] FG cherokee_aero.c mass I_xx 1450.3 # [slug-ft^2] FG cherokee_aero.c mass I_yy 1693.0 # [slug-ft^2] FG cherokee_aero.c mass I_zz 3133.8 # [slug-ft^2] FG cherokee_aero.c mass I_xz 0.0 # [slug-ft^2] FG cherokee_aero.c (assumed) engine cherokee CL CZo -0.11875 # [] FG cherokee_aero.c CL CZ_a -4.74807 # [/rad] FG cherokee_aero.c CL CZ_adot -1.01704 # [/rad] FG cherokee_aero.c CL CZ_q -2.74197 # [/rad] FG cherokee_aero.c CL CZ_de -0.26047 # [/rad] FG cherokee_aero.c CD CXo -0.03174 # [] FG cherokee_aero.c CD CXK 0.09291 # [] FG cherokee_aero.c CD CX_de 0.0 # [/rad] FG cherokee_aero.c Cm Cmo 0.0959 # [] FG cherokee_aero.c Cm Cm_a -1.02308 # [/rad] FG cherokee_aero.c Cm Cm_adot -0.08429 #-12.36523 # [/rad] FG cherokee_aero.c Cm Cm_q -6.34770 # [/rad] FG cherokee_aero.c Cm Cm_de -0.60321 # [/rad] FG cherokee_aero.c CY CY_beta -0.29006 # [/rad] FG cherokee_aero.c CY CY_p -0.0342 # [/rad] FG cherokee_aero.c CY CY_r 0.00048 # [/rad] FG cherokee_aero.c CY CY_da -0.00349 # [/rad] FG cherokee_aero.c, called cyf CY CY_dr 0.02212 # [/rad] FG cherokee_aero.c, called cyps Cl Cl_beta -0.10654 # [/rad] FG cherokee_aero.c Cl Cl_p -0.4704 # [/rad] FG cherokee_aero.c Cl Cl_r 0.1665 # [/rad] FG cherokee_aero.c Cl Cl_da -0.04804 # [/rad] FG cherokee_aero.c, called clf #Cl Cl_dr # [/rad] Cn Cn_beta 0.09197 # [/rad] FG cherokee_aero.c Cn Cn_p -0.0691 # [/rad] FG cherokee_aero.c Cn Cn_r -0.0930 # [/rad] FG cherokee_aero.c Cn Cn_da -0.00706 # [/rad] FG cherokee_aero.c, called cnf Cn Cn_dr -0.00950 # [/rad] FG cherokee_aero.c, called cnps # nose wheel (must be position 0 if present) gear Dx_gear 0 5.5 # x-offset from CG [ft] gear Dy_gear 0 0 # y-offset from CG [ft] gear Dz_gear 0 3.05 # z-offset from CG [ft] gear cgear 0 900 # damping [lbs/ft/sec] gear kgear 0 1400 # springiness [lbs/ft] gear muGear 0 0.01 # rolling coefficient gear strutLength 0 -0.5 # gear travel [ft] (not yet used) # right gear (must be position 1 if present) gear Dx_gear 1 -1.9 # [ft] gear Dy_gear 1 2.5 # [ft] gear Dz_gear 1 3 # [ft] gear cgear 1 1500 # [lbs/ft/sec] gear kgear 1 2400 # [lbs/ft] gear muGear 1 0.01 # rolling coefficient gear strutLength 1 2.5 # [ft] # left gear (must be position 2 if present) gear Dx_gear 2 -1.9 # [ft] gear Dy_gear 2 -2.5 # [ft] gear Dz_gear 2 3 # [ft] gear cgear 2 1500 # [lbs/ft/sec] gear kgear 2 2400 # [lbs/ft] gear muGear 2 0.01 # rolling coefficient gear strutLength 2 2.5 # [ft] # right wing gear Dx_gear 3 0. # [ft] gear Dy_gear 3 17.5 # [ft] gear Dz_gear 3 -3 # [ft] gear cgear 3 100 # [lbs/ft/sec] gear kgear 3 300 # [lbs/ft] gear muGear 3 0.01 # rolling coefficient gear strutLength 3 2.5 # [ft] # left wing gear Dx_gear 4 0. # [ft] gear Dy_gear 4 -17.5 # [ft] gear Dz_gear 4 -3 # [ft] gear cgear 4 100 # [lbs/ft/sec] gear kgear 4 300 # [lbs/ft] gear muGear 4 0.01 # rolling coefficient gear strutLength 4 2.5 # [ft] #record Dz_cg *