Göttingen 765: attempt 2 with Cosford photo


Bob Adams also digitally measured the photo below, taken during the restoration of the Cosford Komet. Bob used CorelDraw and Excel, compensated for photo tilt and other distortions, and came up with the profile shown.

There is one problem with the measurement. The wing's trailing edge is straight, except for a small inboard part, where the wing root fairing starts, and the trailing edge has a small curvature. It can be assumed that the root section is based on chord length without the small extension due to the wing root fairing curvature. This figure is 2360 millimeters. Yet the photo measurement is based on the root chord as seen in the photograph, and this is a slightly larger figure. Therefore the measured profile will be slightly elongated, its relative thickness slightly smaller, and the trailing edge contour is not reliable.




Analysis of the data leads to the following characteristics:

Contour data

(note: the coordinates are not smoothed to achieve mathematically smooth contours, without discontinuous curvatures)

Normalised
x-coordinate

Normalised
y-coordinate

1.00000 0.00084
0.99375 0.00143
0.98750 0.00208
0.98125 0.00253
0.97500 0.00300
0.96875 0.00385
0.96250 0.00446
0.95625 0.00512
0.95000 0.00574
0.94375 0.00638
0.93750 0.00713
0.93125 0.00788
0.92500 0.00867
0.91875 0.00949
0.91250 0.01029
0.90625 0.01109
0.90000 0.01190
0.89375 0.01271
0.88750 0.01361
0.88125 0.01450
0.87500 0.01544
0.86875 0.01648
0.86250 0.01746
0.85625 0.01844
0.85000 0.01942
0.84375 0.02048
0.83750 0.02156
0.83125 0.02262
0.82500 0.02368
0.81875 0.02476
0.81250 0.02584
0.80625 0.02693
0.80000 0.02809
0.79375 0.02924
0.78750 0.03037
0.78125 0.03149
0.77500 0.03263
0.76875 0.03372
0.76250 0.03483
0.75625 0.03597
0.75000 0.03706
0.74375 0.03815
0.73750 0.03919
0.73125 0.04024
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0.71875 0.04235
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0.63750 0.05505
0.63125 0.05594
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0.61875 0.05774
0.61250 0.05863
0.60625 0.05950
0.60000 0.06037
0.59375 0.06125
0.58750 0.06213
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0.53125 0.06973
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0.45000 0.07795
0.44375 0.07839
0.43750 0.07883
0.43125 0.07924
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0.41875 0.08003
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0.29375 0.08211
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0.28125 0.08157
0.27500 0.08123
0.26875 0.08087
0.26250 0.08048
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0.25000 0.07949
0.24375 0.07888
0.23750 0.07837
0.23125 0.07780
0.22500 0.07718
0.21875 0.07658
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0.19375 0.07407
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0.15625 0.06902
0.15000 0.06809
0.14375 0.06694
0.13750 0.06582
0.13125 0.06456
0.12500 0.06335
0.11875 0.06201
0.11250 0.06056
0.10625 0.05907
0.10000 0.05755
0.09375 0.05597
0.08750 0.05415
0.08125 0.05226
0.07500 0.05028
0.06875 0.04819
0.06250 0.04598
0.05625 0.04359
0.05000 0.04100
0.04375 0.03820
0.03750 0.03516
0.03125 0.03174
0.02500 0.02800
0.01875 0.02387
0.01250 0.01919
0.00938 0.01650
0.00625 0.01333
0.00469 0.01141
0.00313 0.00907
0.00156 0.00628
0.00000 0.00000
0.00000 0.00000
0.00156 -0.00657
0.00313 -0.00939
0.00469 -0.01163
0.00625 -0.01363
0.00938 -0.01671
0.01250 -0.01924
0.01875 -0.02301
0.02500 -0.02575
0.03125 -0.02777
0.03750 -0.02950
0.04375 -0.03104
0.05000 -0.03241
0.05625 -0.03375
0.06250 -0.03490
0.06875 -0.03607
0.07500 -0.03700
0.08125 -0.03787
0.08750 -0.03873
0.09375 -0.03953
0.10000 -0.04029
0.10625 -0.04106
0.11250 -0.04177
0.11875 -0.04240
0.12500 -0.04303
0.13125 -0.04365
0.13750 -0.04419
0.14375 -0.04472
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0.17500 -0.04691
0.18125 -0.04727
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0.19375 -0.04787
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0.74375 -0.03361
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0.98750 -0.00359
0.99375 -0.00254
1.00000 -0.00151


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