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USA 31 AIRFOIL (usa31-il) Xfoil prediction polar at RE=1,000,000 Ncrit=9


Details Polar file
Airfoil: USA 31 AIRFOIL (usa31-il)
Reynolds number: 1,000,000
Max Cl/Cd: 88.2 at α=3.75°
Description: Mach=0 Ncrit=9
Source: Xfoil prediction
Download polar: xf-usa31-il-1000000.txt
Download as CSV file: xf-usa31-il-1000000.csv

  
       XFOIL         Version 6.96
  
 Calculated polar for: USA 31 AIRFOIL                                  
  
 1 1 Reynolds number fixed          Mach number fixed         
  
 xtrf =   1.000 (top)        1.000 (bottom)  
 Mach =   0.000     Re =     1.000 e 6     Ncrit =   9.000
  
   alpha    CL        CD       CDp       CM     Top_Xtr  Bot_Xtr
  ------ -------- --------- --------- -------- -------- --------
 -13.500   0.3003   0.09902   0.09694  -0.1712   0.9491   0.0209
 -13.250   0.3036   0.09548   0.09339  -0.1736   0.9473   0.0210
 -13.000   0.3078   0.09183   0.08972  -0.1760   0.9456   0.0211
 -12.750   0.3225   0.08876   0.08664  -0.1773   0.9440   0.0212
 -12.500   0.3278   0.08700   0.08490  -0.1761   0.9410   0.0213
 -12.250   0.3358   0.08518   0.08308  -0.1757   0.9379   0.0214
 -12.000   0.3460   0.08303   0.08093  -0.1764   0.9350   0.0216
 -11.750   0.3569   0.08067   0.07855  -0.1775   0.9328   0.0219
 -11.500   0.3677   0.07814   0.07601  -0.1788   0.9305   0.0222
 -11.250   0.3751   0.07586   0.07373  -0.1792   0.9276   0.0227
 -11.000   0.3768   0.07388   0.07176  -0.1782   0.9229   0.0228
 -10.750   0.3828   0.07137   0.06925  -0.1785   0.9192   0.0235
 -10.500   0.3786   0.06722   0.06507  -0.1805   0.9153   0.0245
 -10.000   0.3736   0.06092   0.05877  -0.1799   0.9041   0.0248
  -9.750   0.3851   0.05880   0.05662  -0.1800   0.8996   0.0250
  -9.500   0.3895   0.05711   0.05495  -0.1789   0.8923   0.0251
  -9.250   0.3983   0.05523   0.05303  -0.1788   0.8852   0.0252
  -9.000   0.4042   0.05347   0.05126  -0.1781   0.8761   0.0254
  -8.750   0.4113   0.05145   0.04919  -0.1781   0.8675   0.0256
  -8.500   0.4161   0.04968   0.04739  -0.1775   0.8572   0.0259
  -8.250   0.4199   0.04760   0.04527  -0.1772   0.8483   0.0261
  -8.000   0.4231   0.04560   0.04323  -0.1768   0.8387   0.0266
  -7.750   0.4238   0.04345   0.04106  -0.1763   0.8297   0.0271
  -7.500   0.4211   0.04090   0.03845  -0.1761   0.8208   0.0279
  -7.250   0.3889   0.03567   0.03323  -0.1762   0.8102   0.0286
  -7.000   0.3558   0.03031   0.02782  -0.1758   0.8009   0.0289
  -6.750   0.3628   0.02920   0.02671  -0.1749   0.7927   0.0290
  -6.500   0.3675   0.02732   0.02478  -0.1749   0.7848   0.0292
  -6.250   0.3820   0.03787   0.03521  -0.1910   0.7957   0.0294
  -6.000   0.3927   0.03602   0.03328  -0.1911   0.7875   0.0297
  -5.750   0.3776   0.02558   0.02245  -0.1962   0.7782   0.0305
  -5.500   0.3874   0.02252   0.01905  -0.1959   0.7697   0.0315
  -5.250   0.4013   0.02185   0.01785  -0.1941   0.7612   0.0330
  -5.000   0.4013   0.01875   0.01439  -0.1903   0.7519   0.0337
  -4.750   0.4172   0.01776   0.01339  -0.1883   0.7429   0.0340
  -4.500   0.4313   0.01704   0.01259  -0.1857   0.7329   0.0343
  -4.250   0.4449   0.01641   0.01188  -0.1830   0.7216   0.0347
  -4.000   0.4545   0.01586   0.01120  -0.1793   0.7097   0.0352
  -3.750   0.4617   0.01539   0.01060  -0.1751   0.6978   0.0357
  -3.500   0.4720   0.01501   0.01005  -0.1714   0.6858   0.0366
  -3.250   0.4818   0.01469   0.00938  -0.1675   0.6751   0.0387
  -3.000   0.4927   0.01395   0.00860  -0.1642   0.6643   0.0392
  -2.750   0.5094   0.01348   0.00809  -0.1619   0.6553   0.0398
  -2.500   0.5240   0.01322   0.00775  -0.1592   0.6464   0.0407
  -2.250   0.5414   0.01196   0.00617  -0.1561   0.6394   0.0314
  -2.000   0.5583   0.01159   0.00570  -0.1537   0.6319   0.0309
  -1.750   0.5777   0.01135   0.00539  -0.1518   0.6254   0.0309
  -1.500   0.5972   0.01118   0.00516  -0.1500   0.6187   0.0309
  -1.250   0.6150   0.01112   0.00502  -0.1478   0.6116   0.0312
  -1.000   0.6364   0.01095   0.00482  -0.1464   0.6061   0.0312
  -0.750   0.6569   0.01086   0.00470  -0.1448   0.6001   0.0314
  -0.500   0.6752   0.01082   0.00460  -0.1427   0.5936   0.0315
  -0.250   0.6967   0.01074   0.00450  -0.1414   0.5881   0.0318
   0.000   0.7169   0.01069   0.00442  -0.1397   0.5818   0.0319
   0.250   0.7357   0.01073   0.00440  -0.1378   0.5756   0.0321
   0.500   0.7582   0.01069   0.00436  -0.1367   0.5704   0.0326
   0.750   0.7795   0.01073   0.00437  -0.1353   0.5640   0.0331
   1.250   0.8195   0.01066   0.00423  -0.1321   0.5511   0.0341
   1.500   0.8394   0.01069   0.00423  -0.1305   0.5443   0.0351
   1.750   0.8587   0.01078   0.00428  -0.1288   0.5375   0.0358
   2.000   0.8803   0.01082   0.00431  -0.1276   0.5301   0.0366
   2.250   0.8990   0.01096   0.00439  -0.1258   0.5225   0.0374
   2.500   0.9206   0.01104   0.00446  -0.1246   0.5156   0.0381
   2.750   0.9398   0.01117   0.00455  -0.1230   0.5077   0.0396
   3.000   0.9586   0.01132   0.00467  -0.1213   0.5002   0.0428
   3.250   0.9773   0.01121   0.00480  -0.1197   0.4920   0.1596
   3.500   0.9949   0.01131   0.00511  -0.1179   0.4845   0.2591
   3.750   1.0161   0.01152   0.00532  -0.1167   0.4773   0.2747
   4.000   1.0335   0.01185   0.00561  -0.1149   0.4690   0.2841
   4.250   1.0543   0.01207   0.00582  -0.1137   0.4625   0.2886
   4.500   1.0724   0.01234   0.00606  -0.1120   0.4554   0.2917
   4.750   1.0910   0.01262   0.00633  -0.1105   0.4491   0.2963
   5.000   1.1112   0.01290   0.00660  -0.1093   0.4423   0.3015
   5.250   1.1285   0.01325   0.00691  -0.1075   0.4353   0.3049
   5.500   1.1480   0.01352   0.00717  -0.1062   0.4290   0.3092
   5.750   1.1658   0.01382   0.00745  -0.1046   0.4219   0.3113
   6.000   1.1825   0.01417   0.00777  -0.1029   0.4152   0.3127
   6.250   1.2037   0.01438   0.00800  -0.1020   0.4107   0.3141
   6.500   1.2224   0.01467   0.00828  -0.1006   0.4048   0.3154
   6.750   1.2379   0.01509   0.00867  -0.0988   0.3989   0.3168
   7.000   1.2585   0.01534   0.00893  -0.0978   0.3938   0.3185
   7.250   1.2778   0.01563   0.00924  -0.0967   0.3894   0.3200
   7.500   1.2938   0.01607   0.00964  -0.0950   0.3831   0.3214
   7.750   1.3129   0.01640   0.00998  -0.0939   0.3784   0.3226
   8.000   1.3318   0.01673   0.01032  -0.0928   0.3739   0.3236
   8.250   1.3489   0.01714   0.01072  -0.0914   0.3687   0.3252
   8.500   1.3654   0.01760   0.01117  -0.0900   0.3635   0.3271
   8.750   1.3855   0.01791   0.01153  -0.0891   0.3594   0.3287
   9.000   1.4025   0.01836   0.01200  -0.0879   0.3540   0.3304
   9.250   1.4173   0.01893   0.01255  -0.0863   0.3484   0.3326
   9.500   1.4360   0.01934   0.01298  -0.0854   0.3439   0.3346
   9.750   1.4528   0.01984   0.01350  -0.0841   0.3380   0.3363
  10.000   1.4676   0.02044   0.01410  -0.0827   0.3331   0.3378
  10.250   1.4840   0.02099   0.01466  -0.0815   0.3281   0.3393
  10.500   1.5011   0.02151   0.01520  -0.0805   0.3229   0.3406
  10.750   1.5123   0.02238   0.01605  -0.0788   0.3144   0.3429
  11.000   1.5287   0.02298   0.01666  -0.0778   0.3063   0.3449
  11.250   1.5429   0.02371   0.01741  -0.0765   0.3015   0.3467
  11.500   1.5545   0.02460   0.01829  -0.0750   0.2917   0.3483
  11.750   1.5665   0.02548   0.01917  -0.0736   0.2843   0.3506
  12.000   1.5784   0.02641   0.02010  -0.0722   0.2771   0.3525
  12.250   1.5906   0.02733   0.02103  -0.0709   0.2700   0.3541
  12.500   1.5998   0.02846   0.02213  -0.0693   0.2612   0.3557
  12.750   1.6077   0.02973   0.02338  -0.0677   0.2518   0.3577
  13.000   1.6179   0.03088   0.02455  -0.0665   0.2430   0.3602
  13.250   1.6244   0.03231   0.02597  -0.0649   0.2350   0.3621
  13.500   1.6343   0.03353   0.02720  -0.0637   0.2273   0.3640
  13.750   1.6376   0.03525   0.02889  -0.0620   0.2178   0.3666
  14.000   1.6430   0.03685   0.03049  -0.0606   0.2084   0.3685
  14.250   1.6477   0.03853   0.03216  -0.0592   0.2006   0.3701
  14.500   1.6522   0.04031   0.03395  -0.0579   0.1931   0.3725
  14.750   1.6572   0.04211   0.03576  -0.0568   0.1863   0.3747
  15.000   1.6589   0.04421   0.03786  -0.0555   0.1780   0.3767
  15.250   1.6617   0.04624   0.03991  -0.0544   0.1715   0.3786
  15.500   1.6633   0.04838   0.04206  -0.0533   0.1643   0.3815
  15.750   1.6649   0.05059   0.04429  -0.0522   0.1591   0.3831
  16.000   1.6646   0.05298   0.04669  -0.0511   0.1517   0.3853
  16.250   1.6629   0.05559   0.04931  -0.0502   0.1439   0.3880
  16.500   1.6615   0.05821   0.05194  -0.0493   0.1372   0.3906
  16.750   1.6588   0.06097   0.05473  -0.0484   0.1309   0.3940
  17.000   1.6488   0.06447   0.05821  -0.0473   0.1202   0.3961
  17.250   1.6417   0.06774   0.06147  -0.0464   0.1110   0.3983
  17.500   1.6269   0.07185   0.06555  -0.0454   0.1001   0.3996
  17.750   1.6205   0.07522   0.06895  -0.0448   0.0951   0.4030
  18.000   1.6101   0.07906   0.07281  -0.0443   0.0889   0.4056
  18.250   1.6042   0.08244   0.07623  -0.0440   0.0842   0.4101
  18.500   1.5947   0.08628   0.08010  -0.0436   0.0796   0.4130
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