Cross-section Airfoil Data (sc1095.dat)#

In this example, the base points are supplied via a separate base points file. The cross section are oriented to the right and points are given in the counterclockwise direction. This is shown in the figure below. The orientation of cross section and points order can also be chosen by your preference or convention.

../../_images/uh60a_point_order.jpg

The base points file includes arbitrary number of lines. each line includes

1lable a_2 a_3

The label can be any number or just strings. You could assign a meaningful name for important points like intersections and assign numbers sequentially for other points. The label will be used to reference the points in building the cross section.

Listing 2 sc1095.dat#
  11  0  0
  22  -0.000102  0.001466
  33  -0.000813  0.003959
  44  -0.002034  0.006255
  55  -0.004067  0.009133
  66  -0.006609  0.012145
  77  -0.009151  0.014727
  88  -0.012201  0.017476
  99  -0.018302  0.022201
 1010  -0.024403  0.026083
 1111  -0.030503  0.029338
 1212  -0.036604  0.032084
 1313  -0.042705  0.034427
 1414  -0.050839  0.037069
 1515  -0.061007  0.039788
 1616  -0.071174  0.042051
 1717  -0.081342  0.043977
 1818  -0.09151  0.045624
 1919  -0.101678  0.047049
 2020  -0.116929  0.048852
 2121  -0.132181  0.050333
 2222  -0.147433  0.051581
 2323  -0.162684  0.052648
 2424  -0.177936  0.05354
 2525  -0.193188  0.054258
 2626  -0.208439  0.054802
 2727  -0.223691  0.055178
 2828  -0.238943  0.055414
 2929  -0.254194  0.055527
 3030  -0.269446  0.05554
 3131  -0.284697  0.055472
 3232  -0.305033  0.055281
 3333  -0.325369  0.05498
 3434  -0.345704  0.054576
 3535  -0.36604  0.054074
 3636  -0.386375  0.053479
 3737  -0.406711  0.052796
 3838  -0.427046  0.052028
 3939  -0.447382  0.051176
 4040  -0.467717  0.050241
 4141  -0.488053  0.049223
 4242  -0.508388  0.048123
 4343  -0.528724  0.046942
 4444  -0.549059  0.045679
 4545  -0.569395  0.044336
 4646  -0.589731  0.042911
 4747  -0.610066  0.041404
 4848  -0.630402  0.039817
 4949  -0.650737  0.038149
 5050  -0.671073  0.036402
 5151  -0.691408  0.034577
 5252  -0.711744  0.032673
 5353  -0.732079  0.030696
 5454  -0.752415  0.028652
 5555  -0.77275  0.026547
 5656  -0.793086  0.024387
 5757  -0.813421  0.02218
 5858  -0.833757  0.01993
 5959  -0.854092  0.017642
 6060  -0.874428  0.01532
 6161  -0.894764  0.01297
 6262  -0.915099  0.010595
 6363  -0.925267  0.009393
 6464  -0.935435  0.008179
 6565  -0.945602  0.00695
 6666  -0.95577  0.005702
 6767  -0.965938  0.004433
 6868  -0.976106  0.003603
 6969  -0.986274  0.002805
 7070  -0.996441  0.002008
 7171  -1  0.001729
 7272  -1  -0.001729
 7373  -0.996441  -0.001875
 7474  -0.986274  -0.002294
 7575  -0.976106  -0.002713
 7676  -0.965938  -0.003131
 7777  -0.95577  -0.004019
 7878  -0.945602  -0.004889
 7979  -0.935435  -0.005745
 8080  -0.925267  -0.006589
 8181  -0.915099  -0.007424
 8282  -0.894764  -0.009078
 8383  -0.874428  -0.010723
 8484  -0.854092  -0.012355
 8585  -0.833757  -0.013971
 8686  -0.813421  -0.015566
 8787  -0.793086  -0.017137
 8888  -0.77275  -0.018679
 8989  -0.752415  -0.020187
 9090  -0.732079  -0.021655
 9191  -0.711744  -0.023078
 9292  -0.691408  -0.024452
 9393  -0.671073  -0.025771
 9494  -0.650737  -0.027033
 9595  -0.630402  -0.028238
 9696  -0.610066  -0.029384
 9797  -0.589731  -0.030467
 9898  -0.569395  -0.031488
 9999  -0.549059  -0.032448
100100  -0.528724  -0.033347
101101  -0.508388  -0.034186
102102  -0.488053  -0.034966
103103  -0.467717  -0.035688
104104  -0.447382  -0.03635
105105  -0.427046  -0.036952
106106  -0.406711  -0.037494
107107  -0.386375  -0.037974
108108  -0.36604  -0.038392
109109  -0.345704  -0.038744
110110  -0.325369  -0.039027
111111  -0.305033  -0.039236
112112  -0.284697  -0.039368
113113  -0.269446  -0.039414
114114  -0.254194  -0.03941
115115  -0.238943  -0.039348
116116  -0.223691  -0.039225
117117  -0.208439  -0.039032
118118  -0.193188  -0.038762
119119  -0.177936  -0.038406
120120  -0.162684  -0.037948
121121  -0.147433  -0.037372
122122  -0.132181  -0.03666
123123  -0.116929  -0.035795
124124  -0.101678  -0.03476
125125  -0.09151  -0.033965
126126  -0.081342  -0.033043
127127  -0.071174  -0.031911
128128  -0.061007  -0.03048
129129  -0.050839  -0.02862
130130  -0.042705  -0.026694
131131  -0.036604  -0.024941
132132  -0.030503  -0.022933
133133  -0.024403  -0.020662
134134  -0.018302  -0.01798
135135  -0.012201  -0.014526
136136  -0.009151  -0.01236
137137  -0.006609  -0.010198
138138  -0.004067  -0.007565
139139  -0.002034  -0.005099
140140  -0.000813  -0.003219
141141  -0.000102  -0.001117
142142  0  0