1# Jeff Scott 2# DHC-6 Twin Otter 3# small twin turboprop engine commuter aircraft with simulated 4# icing characteristics (entire aircraft iced) 5# This model was developed by Devesh Pokhariyal of the Smart Icing 6# Systems Aerodynamics group (Prof. Michael Bragg, head) at the 7# University of Illinois. The aircraft data is from: 8# Pokhariyal, Devesh and Merret, Jason. FDC flight simulator 9# Twin Otter input file (version5_bat), 5/23/00. 10# Pokhariyal, Devesh and Merret, Jason. FDC flight simulator 11# Twin Otter icing file (icesev_bat), 5/30/00. 12# Ratvasky, T.P. and Ranaudo, R.J. "Icing Effects on Aircraft 13# Stability and Control Determined from Flight Data," 31st 14# Aerospace Sciences Meeting and Exhibit, 11-14 Jan 1993, 15# AIAA-93-0398. 16# 05-30-2000 file creation 17 18geometry bw 65.0 # [ft] 19geometry cbar 6.5 # [ft] 20geometry Sw 420.0 # [ft^2] 21geometry bh 20.7 # [ft] AIAA 93-0398 Table 1 22geometry ch 4.8 # [ft] AIAA 93-0398 Table 1 23geometry Sh 97.8 # [ft^2] AIAA 93-0398 Table 1 24 25controlSurface de 20 20 # [deg] guess for now 26controlSurface da 20 20 # [deg] guess for now 27controlSurface dr 20 20 # [deg] guess for now 28 29mass Weight 10141 # [lb] 30mass I_xx 16039.3 # [slug-ft^2] 31mass I_yy 22841.6 # [slug-ft^2] 32mass I_zz 35807.4 # [slug-ft^2] 33mass I_xz 1102.8 # [slug-ft^2] 34 35 36# aircraft specs: 2 engines of 462 kW each 37# ~2000 lb static thrust each 38engine simpleSingle 2000 # [lb] 39 40 41CL CZo -0.360 # [] 42CL CZ_a -5.660 # [/rad] 43#CL CZ_a2 0.0 # [/rad] 44#CL CZ_a3 0.0 # [/rad] 45CL CZ_q -19.97 # [/rad] 46CL CZ_de -0.608 # [/rad] 47#CL CZ_deb2 0.0 # [/rad] 48#CL CZ_df 0.0 # [/rad] 49#CL CZ_adf 0.0 # [/rad] 50 51CD CXo -0.0488 # [] 52CD CX_a 0.223 # [/rad] 53CD CX_a2 1.659 # [/rad] 54#CD CX_a3 0.0 # [/rad] 55#CD CX_q 0.0 # [/rad] 56#CD CX_de 0.0 # [/rad] 57#CD CX_dr 0.0 # [/rad] 58#CD CX_df 0.0 # [/rad] 59#CD CX_adf 0.0 # [/rad] 60 61Cm Cmo 0.040 # [] 62Cm Cm_a -1.310 # [/rad] 63#Cm Cm_a2 0.0 # [/rad] 64Cm Cm_q -34.2 # [/rad] 65Cm Cm_de -1.740 # [/rad] 66#Cm Cm_b2 0.0 # [/rad] 67#Cm Cm_r 0.0 # [/rad] 68#Cm Cm_df 0.0 # [/rad] 69 70#CY CYo 0.0 # [] 71CY CY_beta -0.6 # [/rad] 72CY CY_p -0.2 # [/rad] 73CY CY_r 0.4 # [/rad] 74#CY CY_da 0.0 # [/rad] 75CY CY_dr 0.15 # [/rad] 76#CY CY_dra 0.0 # [/rad] 77#CY CY_bdot 0.0 # [/rad] 78 79#Cl Clo 0.0 # [] 80Cl Cl_beta -0.08 # [/rad] 81Cl Cl_p -0.5 # [/rad] 82Cl Cl_r 0.06 # [/rad] 83Cl Cl_da -0.15 # [/rad] 84Cl Cl_dr 0.015 # [/rad] 85#Cl Cl_daa 0.0 # [/rad] 86 87#Cn Cno 0.0 # [/rad] 88Cn Cn_beta 0.1 # [/rad] 89Cn Cn_p -0.06 # [/rad] 90Cn Cn_r -0.18 # [/rad] 91Cn Cn_da -0.001 # [/rad] 92Cn Cn_dr -0.125 # [/rad] 93#Cn Cn_q 0.0 # [/rad] 94#Cn Cn_b3 0.0 # [/rad] 95 96ice iceTime 120 # [s] 97ice transientTime 30 # [s] 98ice eta_ice_final 0.3 # [] do not set higher than about 0.4! 99 100ice kCXo 6.52696 # [] 101ice kCX_a -0.14296 # [] 102ice kCX_a2 -1.59837 # [] 103#ice kCX_a3 0.0 # [] 104#ice kCX_q 0.0 # [] 105#ice kCX_de 0.0 # [] 106#ice kCX_df 0.0 # [] 107#ice kCX_dr 0.0 # [] 108#ice kCX_adf 0.0 # [] 109 110ice kCZo 0.0 # [] 111ice kCZ_a -1.48148 # [] 112#ice kCZ_a2 0.0 # [] 113#ice kCZ_a3 0.0 # [] 114ice kCZ_q -0.20741 # [] 115ice kCZ_de -1.40741 # [] 116#ice kCZ_df 0.0 # [] 117#ice kCZ_adf 0.0 # [] 118#ice kCZ_deb2 0.0 # [] 119 120ice kCmo 0.0 # [] 121ice kCm_a -1.46667 # [] 122#ice kCm_a2 0.0 # [] 123#ice kCm_b2 0.0 # [] 124ice kCm_q -0.51852 # [] 125#ice kCm_r 0.0 # [] 126ice kCm_de -1.48148 # [] 127#ice kCm_df 0.0 # [] 128 129#ice kCYo 0.0 # [] 130ice kCY_beta -2.96296 # [] 131ice kCY_p 0.0 # [] 132ice kCY_r 0.0 # [] 133#ice kCY_da 0.0 # [] 134ice kCY_dr -1.18519 # [] 135#ice kCY_dra 0.0 # [] 136#ice kCY_bdot 0.0 # [] 137 138#ice kClo 0.0 # [] 139ice kCl_beta -1.48148 # [] 140ice kCl_p -1.48148 # [] 141ice kCl_r 0.0 # [] 142ice kCl_da -1.48148 # [] 143ice kCl_dr -1.18519 # [] 144#ice kCl_daa 0.0 # [] 145 146#ice kCno 0.0 # [] 147ice kCn_beta -2.96296 # [] 148#ice kCn_b3 0.0 # [] 149ice kCn_p 0.0 # [] 150#ice kCn_q 0.0 # [] 151ice kCn_r -0.88889 # [] 152ice kCn_da 0.0 # [] 153ice kCn_dr -1.18519 # [] 154 155ice beta_probe_wing 5.0 # [ft] 156ice beta_probe_tail 3.5 # [ft] 157