# Jeff Scott # DHC-6 Twin Otter # small twin turboprop engine commuter aircraft with simulated # icing characteristics (tail iced) # This model was developed by Devesh Pokhariyal of the Smart Icing # Systems Aerodynamics group (Prof. Michael Bragg, head) at the # University of Illinois. The aircraft data is from: # Pokhariyal, Devesh and Merret, Jason. FDC flight simulator # Twin Otter input file (version5_bat), 5/23/00. # Pokhariyal, Devesh and Merret, Jason. FDC flight simulator # Twin Otter icing file (icetailsev_bat), 5/30/00. # Ratvasky, T.P. and Ranaudo, R.J. "Icing Effects on Aircraft # Stability and Control Determined from Flight Data," 31st # Aerospace Sciences Meeting and Exhibit, 11-14 Jan 1993, # AIAA-93-0398. # 05-30-2000 file creation geometry bw 65.0 # [ft] geometry cbar 6.5 # [ft] geometry Sw 420.0 # [ft^2] geometry bh 20.7 # [ft] AIAA 93-0398 Table 1 geometry ch 4.8 # [ft] AIAA 93-0398 Table 1 geometry Sh 97.8 # [ft^2] AIAA 93-0398 Table 1 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 10141 # [lb] mass I_xx 16039.3 # [slug-ft^2] mass I_yy 22841.6 # [slug-ft^2] mass I_zz 35807.4 # [slug-ft^2] mass I_xz 1102.8 # [slug-ft^2] # aircraft specs: 2 engines of 462 kW each # ~2000 lb static thrust each engine simpleSingle 2000 # [lb] CL CZo -0.360 # [] CL CZ_a -5.660 # [/rad] #CL CZ_a2 0.0 # [/rad] #CL CZ_a3 0.0 # [/rad] CL CZ_q -19.97 # [/rad] CL CZ_de -0.608 # [/rad] #CL CZ_deb2 0.0 # [/rad] #CL CZ_df 0.0 # [/rad] #CL CZ_adf 0.0 # [/rad] CD CXo -0.0488 # [] CD CX_a 0.223 # [/rad] CD CX_a2 1.659 # [/rad] #CD CX_a3 0.0 # [/rad] #CD CX_q 0.0 # [/rad] #CD CX_de 0.0 # [/rad] #CD CX_dr 0.0 # [/rad] #CD CX_df 0.0 # [/rad] #CD CX_adf 0.0 # [/rad] Cm Cmo 0.040 # [] Cm Cm_a -1.310 # [/rad] #Cm Cm_a2 0.0 # [/rad] Cm Cm_q -34.2 # [/rad] Cm Cm_de -1.740 # [/rad] #Cm Cm_b2 0.0 # [/rad] #Cm Cm_r 0.0 # [/rad] #Cm Cm_df 0.0 # [/rad] #CY CYo 0.0 # [] CY CY_beta -0.6 # [/rad] CY CY_p -0.2 # [/rad] CY CY_r 0.4 # [/rad] #CY CY_da 0.0 # [/rad] CY CY_dr 0.15 # [/rad] #CY CY_dra 0.0 # [/rad] #CY CY_bdot 0.0 # [/rad] #Cl Clo 0.0 # [] Cl Cl_beta -0.08 # [/rad] Cl Cl_p -0.5 # [/rad] Cl Cl_r 0.06 # [/rad] Cl Cl_da -0.15 # [/rad] Cl Cl_dr 0.015 # [/rad] #Cl Cl_daa 0.0 # [/rad] #Cn Cno 0.0 # [/rad] Cn Cn_beta 0.1 # [/rad] Cn Cn_p -0.06 # [/rad] Cn Cn_r -0.18 # [/rad] Cn Cn_da -0.001 # [/rad] Cn Cn_dr -0.125 # [/rad] #Cn Cn_q 0.0 # [/rad] #Cn Cn_b3 0.0 # [/rad] ice iceTime 120 # [s] ice transientTime 30 # [s] ice eta_ice_final 0.3 # [] do not set higher than about 0.4! ice kCXo 1.58844 # [] ice kCX_a -0.04504 # [] ice kCX_a2 -0.58415 # [] #ice kCX_a3 0.0 # [] #ice kCX_q 0.0 # [] #ice kCX_de 0.0 # [] #ice kCX_df 0.0 # [] #ice kCX_dr 0.0 # [] #ice kCX_adf 0.0 # [] ice kCZo 0.0 # [] ice kCZ_a -0.36593 # [] #ice kCZ_a2 0.0 # [] #ice kCZ_a3 0.0 # [] ice kCZ_q -0.20741 # [] ice kCZ_de -1.05556 # [] #ice kCZ_df 0.0 # [] #ice kCZ_adf 0.0 # [] #ice kCZ_deb2 0.0 # [] ice kCmo 0.0 # [] ice kCm_a -0.53244 # [] #ice kCm_a2 0.0 # [] #ice kCm_b2 0.0 # [] ice kCm_q -0.51852 # [] #ice kCm_r 0.0 # [] ice kCm_de -1.24756 # [] #ice kCm_df 0.0 # [] #ice kCYo 0.0 # [] ice kCY_beta -2.96296 # [] ice kCY_p 0.0 # [] ice kCY_r 0.0 # [] #ice kCY_da 0.0 # [] ice kCY_dr -1.18519 # [] #ice kCY_dra 0.0 # [] #ice kCY_bdot 0.0 # [] #ice kClo 0.0 # [] ice kCl_beta -1.48148 # [] ice kCl_p -1.48148 # [] ice kCl_r 0.0 # [] ice kCl_da -1.48148 # [] ice kCl_dr -1.18519 # [] #ice kCl_daa 0.0 # [] #ice kCno 0.0 # [] ice kCn_beta -2.96296 # [] #ice kCn_b3 0.0 # [] ice kCn_p 0.0 # [] #ice kCn_q 0.0 # [] ice kCn_r -0.88889 # [] ice kCn_da 0.0 # [] ice kCn_dr -1.18519 # [] ice beta_probe_wing 5.0 # [ft] ice beta_probe_tail 3.5 # [ft]