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