An example of a typical airfoil data file in the mixed format. Note that the first line is the airfoil name. The second line gives the number of coordinate pairs that define the upper and lower surfaces. The third line must be blank. The top surface, beginning at the leading edge and progressing to the trailing edge, starts on the fourth line and continues until it terminates at a blank line. Following the blank line, the bottom surface is defined in a similar manner.

This format is inflexible in its construction and it is unable to tolerate any blank lines or non-numeric data within the coordinate fields.

NASA/LANGLEY NLF 0414F AIRFOIL
43.0      40.0

0.0000000 0.0000000
0.0002094 0.0032797
0.0024032 0.0106837
0.0075199 0.0177575
0.0156058 0.0242425
0.0265241 0.0304597
0.0400431 0.0365741
0.0560369 0.0426230
0.0744421 0.0485159
0.0951302 0.0541870
0.1179169 0.0596196
0.1426732 0.0648149
0.1692863 0.0698309
0.1975920 0.0745702
0.2274915 0.0789500
0.2587907 0.0829001
0.2913420 0.0863393
0.3249547 0.0892465
0.3594246 0.0916002
0.3945049 0.0933135
0.4300910 0.0943827
0.4658635 0.0947739
0.5015802 0.0944966
0.5370910 0.0934517
0.5722421 0.0916209
0.6067503 0.0889526
0.6402998 0.0853921
0.6727199 0.0808877
0.7038118 0.0751160
0.7335511 0.0675314
0.7633430 0.0580612
0.7937308 0.0478613
0.8241454 0.0379971
0.8539022 0.0291099
0.8821820 0.0216244
0.9082243 0.0155438
0.9316924 0.0107129
0.9520135 0.0070130
0.9689228 0.0042629
0.9823112 0.0023427
0.9919964 0.0010932
0.9979467 0.0003898
1.0000000 0.0001959

0.0000000 0.0000000
0.0002217 -.0021140
0.0022841 -.0069216
0.0074238 -.0107903
0.0159347 -.0144468
0.0278726 -.0180257
0.0429800 -.0214800
0.0609524 -.0248220
0.0816471 -.0280287
0.1049076 -.0310793
0.1305626 -.0339305
0.1584566 -.0365595
0.1883933 -.0389607
0.2201672 -.0411107
0.2535623 -.0429745
0.2883051 -.0445354
0.3241533 -.0457801
0.3608882 -.0466806
0.3983647 -.0471698
0.4363414 -.0472223
0.4745037 -.0468228
0.5126616 -.0460074
0.5505865 -.0447514
0.5879576 -.0429205
0.6245060 -.0404731
0.6599402 -.0372181
0.6941310 -.0328830
0.7271526 -.0262009
0.7621386 -.0180301
0.7975130 -.0117427
0.8315642 -.0070185
0.8635970 -.0036384
0.8928488 -.0015343
0.9190598 -.0004323
0.9417190 0.0000367
0.9606961 0.0001832
0.9759963 0.0001791
0.9876149 0.0001215
0.9955088 -.0000158
1.0000000 -0.0001959