#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Aircraft: # Fokker DR-1 # # File name: # fkdr1-v1-nl # # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Authors: # # Michael Selig # http://www.uiuc.edu/~m-selig # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # For update history, see the file README.fkdr1.html # Last update 021123 # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # Specs: # Stall speed = "45 knots (NASA SP)" # However, the footnote indicates that 45 knots is an estimate, # Stall speed is actually 40 knots based on the GOE 298 airfoil using the tripe. # Max speed = 100 knots w/ Clerget 9B 130 HP (115 mph) # Max rate of climb at sea level = 1200 fpm # Weight = 1290 w/ half fuel in main tank # #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # various "init" FGFS settings init use_V_rel_wind_2U init use_dyn_on_speed_curve1 init dyn_on_speed 2 init dyn_on_speed_zero 1 init use_Alpha_dot_on_speed 7 # [ft/sec] speed below which Alpha_dot is set to zero init use_gamma_horiz_on_speed 5 # [ft/sec] speed above which Gamma_horiz_deg is used in chase view [1] init downwashMode 100 init downwashCoef 0.034 # [1/ft] see Red Baron model notes 020901 p 1 # geometry data geometry bw 23.58 # [ft] [x] spreadsheet geometry cbar 8.52 # [ft] [x] 020821 p. 0 geometry Sw 200.9 # [ft^2] [x] spreadsheet # control deflections controlSurface de 14.6 17.9 # [deg] controlSurface da 17.35 17.35 # [deg] controlSurface dr 25 25 # [deg] mass Weight 1290 # [lb] [x] mass I_xx 368.55 # [slug-ft^2] [x] mass I_yy 522.24 # [slug-ft^2] [x] mass I_zz 731.37 # [slug-ft^2] [x] mass I_xz 0 # [slug-ft^2] [ ] # Apparent mass terms mass Mass_appMass_ratio .068 # [x] apparent mass notes 020330 p 24 mass I_xx_appMass_ratio .138 # [x] apparent mass notes 020330 p 25 mass I_yy_appMass_ratio .031 # [x] apparent mass notes 020330 p 26 engine simpleSingleModel 460 -3.35 263 # [lb] [fps] [lb/fps] # where token3 - static thrust in [lb] # token4 - speed at which thrust goes to zero [ft/sec] # token5 - slope dT/dV at the speed at which thrust goes to zero [lb/fps] # turn on gyroscopic forces between pitch/yaw and engine rotation engine gyroForce_Q_body engine gyroForce_R_body engine omegaRPM 300 1200 # [rpm] {minOmegaRPM} {maxOmegaRPM} engine polarInertia 10.0232 # [slug-ft^2] engine slipstream_effects engine propDia 9 # [ft] #engine eta_q_CL_adot 1 #engine eta_q_CL_q 1 engine eta_q_Cm_q 1 engine eta_q_Cm_adot 1 engine eta_q_Cmfade 1 #engine eta_q_Cl_beta 1 #engine eta_q_Cl_p 1 #engine eta_q_Cl_r 1 engine eta_q_Cl_dr 1 engine eta_q_CY_beta 1 #engine eta_q_CY_p 1 #engine eta_q_CY_r 1 engine eta_q_CY_dr 1 engine eta_q_Cn_beta 1 engine eta_q_Cn_p 1 engine eta_q_Cn_r 1 engine eta_q_Cn_dr 1 # lift CL CLfa CLfa.dat 0 1 # [x] lift +-180 deg, see 020821-fokker-dr1 dir CL CL_adot 0.759 # [/rad] [x] LDM/S&C notes 020907 p 7 CL CL_q 1.245 # [/rad] [x] LDM/S&C notes 020907 p 11 # drag CD CDo 0.0323 # [x] aircraft parasite drag, NASA SP-468, CD CDfa CDfa.dat 0 1 1 # [x] extra wing parasite drag +-180 deg, see 020821-fokker-dr1 dir CD CD_de 0.0136 # [] CD CDK 0.0922 # [x] Cl^2 drag component, see notes Fokker Dr.1 notes 021019 p 6 # pitching moment Cm Cmfa Cmfa.dat 0 1 # [x] moment +-180 deg, see 020821-fokker-dr1 dir, Cm Cmfade Cmfade.dat 0 1 1 # [x] moment due to tail from +-180 deg, see 020821-fokker-dr1 dir Cm Cm_adot -1.122 # [/rad] [x] LDM/S&C notes 020907 p 7 Cm Cm_q -1.839 # [/rad] [x] LDM/S&C notes 020907 p 11 # due to side slip CY CY_beta -0.3855 # [/rad] [x] Fokker Dr.1 notes 021019 p 2 Cl Cl_beta -0.02 # [/rad] [] placeholder Cn Cn_beta 0.096 # [/rad] [x] Fokker Dr.1 notes 021019 p 2 # due to aileron deflection #CY CY_da 0 Cl Cl_da -0.087 # [/rad] [x] S&C notes 020915 p 1 Cn Cn_da 0.0552 # [/rad] [] adverse yaw placeholder, tuned for now # This is a strong function of the elephant ears at the ends # of the ailerons and three different types were used, so this # value had large variation depending on the model. # The larger the elephant ears, the better the aileron balance # (and hence less "heavy" the feel), but the bigger ears # resulted in more adverse yaw. Pick your poison. # due to rudder deflection CY CY_dr 0.094 # [/rad] [x] Fokker Dr.1 notes 021019 p 3 # was S&C notes 020920 p 3 (0.0525) Cn Cn_dr -0.0502 # [/rad] [x] Fokker Dr.1 notes 021019 p 3 # was S&C notes 020920 p 4 Cl Cl_dr 0.005 # [/rad] [x] Fokker Dr.1 notes 021019 p 3 # was 020920 S&C notes, 020920 p.1-2 # due to roll rate CY CY_p -0.01 # [/rad] [x] Fokker Dr.1 notes 021019 p 4 Cl Cl_p -0.193 # [/rad] [x] S&C notes 020914 p 11 w/ 70% correction # also from pilot report: "substantial opposite aileron is required to stop the roll" # But this comment could be because the replica has Ixx too large. Cn Cn_p -0.0109 # [/rad] [x] Fokker Dr.1 notes 021019 p 4 # due to yaw rate CY CY_r 0.1047 # [/rad] [x] Fokker Dr.1 notes 021019 p 4 Cl Cl_r 0.0458 # [/rad] [x] Fokker Dr.1 notes 021019 p 5 Cn Cn_r -0.082 # [/rad] [x] Fokker Dr.1 notes 021019 p 5 # was S&C notes 020920 p 5 # nose wheel (must be position 0 if present) gear Dx_gear 0 25.5 # x-offset from CG [ft] gear Dy_gear 0 0 # y-offset from CG [ft] gear Dz_gear 0 -0.5 # z-offset from CG [ft] gear cgear 0 100 # damping [lbs/ft/sec] gear kgear 0 200 # 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 1.356 # [ft] gear Dy_gear 1 2.29 # [ft] gear Dz_gear 1 5.8 # [ft] gear cgear 1 500 # [lbs/ft/sec] gear kgear 1 1000 # [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 1.356 # [ft] gear Dy_gear 2 -2.29 # [ft] gear Dz_gear 2 5.8 # [ft] gear cgear 2 500 # [lbs/ft/sec] gear kgear 2 1000 # [lbs/ft] gear muGear 2 0.01 # rolling coefficient gear strutLength 2 2.5 # [ft] # tail dragger gear Dx_gear 3 -12.79 # [ft] gear Dy_gear 3 0 # [ft] gear Dz_gear 3 2.5 # [ft] gear cgear 3 100 # [lbs/ft/sec] gear kgear 3 200 # [lbs/ft] gear muGear 3 0.05 # rolling coefficient gear strutLength 3 2.5 # [ft] # left wing tip gear Dx_gear 4 1.356 # [ft] gear Dy_gear 4 -12.0 # [ft] gear Dz_gear 4 2.2 # [ft] gear cgear 4 150 # [lbs/ft/sec] gear kgear 4 300 # [lbs/ft] gear muGear 4 0.01 # rolling coefficient gear strutLength 4 2.5 # [ft] # right wing tip gear Dx_gear 5 1.356 # [ft] gear Dy_gear 5 12.0 # [ft] gear Dz_gear 5 2.2 # [ft] gear cgear 5 150 # [lbs/ft/sec] gear kgear 5 300 # [lbs/ft] gear muGear 5 0.01 # rolling coefficient gear strutLength 5 2.5 # [ft] *