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NACA 2421 (naca2421-il) Xfoil prediction polar at RE=500,000 Ncrit=5


Details Polar file
Airfoil: NACA 2421 (naca2421-il)
Reynolds number: 500,000
Max Cl/Cd: 67.58 at α=7.5°
Description: Mach=0 Ncrit=5
Source: Xfoil prediction
Download polar: xf-naca2421-il-500000-n5.txt
Download as CSV file: xf-naca2421-il-500000-n5.csv

  
       XFOIL         Version 6.96
  
 Calculated polar for: NACA 2421                                       
  
 1 1 Reynolds number fixed          Mach number fixed         
  
 xtrf =   1.000 (top)        1.000 (bottom)  
 Mach =   0.000     Re =     0.500 e 6     Ncrit =   5.000
  
   alpha    CL        CD       CDp       CM     Top_Xtr  Bot_Xtr
  ------ -------- --------- --------- -------- -------- --------
 -19.500  -1.0668   0.08840   0.08336  -0.0636   1.0000   0.0538
 -19.250  -1.0762   0.08388   0.07880  -0.0656   1.0000   0.0544
 -19.000  -1.0857   0.07938   0.07423  -0.0675   1.0000   0.0550
 -18.750  -1.0947   0.07500   0.06978  -0.0693   1.0000   0.0556
 -18.500  -1.1025   0.07081   0.06552  -0.0710   1.0000   0.0563
 -18.250  -1.1091   0.06684   0.06147  -0.0725   1.0000   0.0570
 -18.000  -1.1143   0.06311   0.05766  -0.0739   1.0000   0.0577
 -17.750  -1.1178   0.05964   0.05410  -0.0752   1.0000   0.0585
 -17.500  -1.1197   0.05642   0.05079  -0.0762   1.0000   0.0591
 -17.250  -1.1266   0.05272   0.04703  -0.0774   1.0000   0.0598
 -17.000  -1.1310   0.04938   0.04363  -0.0783   1.0000   0.0605
 -16.750  -1.1332   0.04639   0.04058  -0.0790   1.0000   0.0613
 -16.500  -1.1337   0.04369   0.03781  -0.0795   1.0000   0.0621
 -16.250  -1.1327   0.04125   0.03530  -0.0798   1.0000   0.0629
 -16.000  -1.1303   0.03904   0.03302  -0.0798   1.0000   0.0638
 -15.750  -1.1268   0.03705   0.03097  -0.0797   1.0000   0.0646
 -15.500  -1.1256   0.03500   0.02887  -0.0792   1.0000   0.0655
 -15.250  -1.1253   0.03309   0.02692  -0.0784   1.0000   0.0664
 -15.000  -1.1248   0.03145   0.02524  -0.0770   1.0000   0.0674
 -14.750  -1.1244   0.03003   0.02377  -0.0753   1.0000   0.0684
 -14.500  -1.1249   0.02879   0.02249  -0.0730   1.0000   0.0694
 -14.250  -1.1270   0.02772   0.02137  -0.0702   1.0000   0.0703
 -14.000  -1.1095   0.02647   0.02008  -0.0708   0.9978   0.0716
 -13.750  -1.0898   0.02522   0.01880  -0.0718   0.9950   0.0731
 -13.500  -1.0674   0.02416   0.01771  -0.0730   0.9927   0.0747
 -13.250  -1.0449   0.02325   0.01676  -0.0738   0.9899   0.0765
 -13.000  -1.0231   0.02239   0.01586  -0.0743   0.9860   0.0783
 -12.750  -1.0003   0.02149   0.01495  -0.0750   0.9826   0.0803
 -12.500  -0.9753   0.02072   0.01417  -0.0759   0.9796   0.0825
 -12.250  -0.9524   0.02009   0.01349  -0.0761   0.9750   0.0845
 -12.000  -0.9320   0.01939   0.01279  -0.0758   0.9689   0.0867
 -11.750  -0.9077   0.01875   0.01214  -0.0761   0.9644   0.0894
 -11.500  -0.8878   0.01825   0.01161  -0.0753   0.9569   0.0919
 -11.250  -0.8666   0.01767   0.01103  -0.0748   0.9497   0.0946
 -11.000  -0.8473   0.01719   0.01053  -0.0737   0.9409   0.0976
 -10.750  -0.8264   0.01677   0.01007  -0.0727   0.9322   0.1006
 -10.500  -0.8084   0.01632   0.00962  -0.0712   0.9231   0.1039
 -10.250  -0.7888   0.01595   0.00922  -0.0699   0.9144   0.1074
 -10.000  -0.7700   0.01564   0.00888  -0.0684   0.9059   0.1106
  -9.750  -0.7503   0.01530   0.00853  -0.0671   0.8967   0.1146
  -9.500  -0.7278   0.01502   0.00821  -0.0662   0.8886   0.1185
  -9.250  -0.7064   0.01471   0.00790  -0.0651   0.8792   0.1223
  -9.000  -0.6833   0.01443   0.00759  -0.0643   0.8708   0.1266
  -8.750  -0.6602   0.01420   0.00732  -0.0635   0.8611   0.1306
  -8.500  -0.6372   0.01392   0.00703  -0.0626   0.8517   0.1349
  -8.250  -0.6132   0.01370   0.00678  -0.0619   0.8424   0.1391
  -8.000  -0.5892   0.01347   0.00652  -0.0612   0.8326   0.1432
  -7.750  -0.5653   0.01324   0.00628  -0.0605   0.8226   0.1479
  -7.500  -0.5405   0.01306   0.00605  -0.0599   0.8120   0.1522
  -7.250  -0.5162   0.01284   0.00582  -0.0592   0.8025   0.1568
  -7.000  -0.4916   0.01265   0.00560  -0.0586   0.7919   0.1620
  -6.750  -0.4664   0.01249   0.00540  -0.0581   0.7817   0.1669
  -6.500  -0.4420   0.01228   0.00519  -0.0574   0.7706   0.1730
  -6.250  -0.4166   0.01213   0.00501  -0.0569   0.7606   0.1792
  -6.000  -0.3919   0.01195   0.00483  -0.0562   0.7496   0.1866
  -5.500  -0.3415   0.01165   0.00451  -0.0551   0.7279   0.2035
  -5.250  -0.3160   0.01152   0.00437  -0.0546   0.7175   0.2126
  -5.000  -0.2906   0.01140   0.00425  -0.0541   0.7056   0.2226
  -4.750  -0.2650   0.01129   0.00413  -0.0536   0.6943   0.2318
  -4.500  -0.2393   0.01122   0.00402  -0.0531   0.6816   0.2411
  -4.250  -0.2136   0.01111   0.00392  -0.0526   0.6696   0.2504
  -4.000  -0.1878   0.01107   0.00383  -0.0521   0.6580   0.2596
  -3.750  -0.1619   0.01096   0.00374  -0.0516   0.6469   0.2687
  -3.500  -0.1359   0.01092   0.00366  -0.0512   0.6361   0.2769
  -3.250  -0.1096   0.01085   0.00359  -0.0508   0.6250   0.2846
  -3.000  -0.0838   0.01081   0.00352  -0.0503   0.6146   0.2927
  -2.750  -0.0568   0.01077   0.00346  -0.0500   0.6050   0.2997
  -2.500  -0.0313   0.01071   0.00340  -0.0495   0.5954   0.3086
  -2.250  -0.0044   0.01067   0.00336  -0.0492   0.5866   0.3172
  -2.000   0.0215   0.01063   0.00331  -0.0487   0.5769   0.3256
  -1.750   0.0478   0.01060   0.00328  -0.0483   0.5681   0.3355
  -1.500   0.0739   0.01056   0.00325  -0.0479   0.5586   0.3460
  -1.250   0.0999   0.01055   0.00323  -0.0474   0.5502   0.3578
  -1.000   0.1264   0.01049   0.00321  -0.0471   0.5426   0.3699
  -0.750   0.1525   0.01048   0.00320  -0.0467   0.5346   0.3835
  -0.500   0.1784   0.01044   0.00320  -0.0462   0.5278   0.4000
  -0.250   0.2048   0.01038   0.00320  -0.0459   0.5206   0.4167
   0.000   0.2301   0.01036   0.00322  -0.0453   0.5125   0.4367
   0.250   0.2556   0.01031   0.00324  -0.0448   0.5043   0.4618
   0.500   0.2808   0.01028   0.00327  -0.0442   0.4947   0.4863
   0.750   0.3059   0.01029   0.00331  -0.0436   0.4859   0.5063
   1.000   0.3319   0.01029   0.00335  -0.0431   0.4770   0.5245
   1.250   0.3569   0.01034   0.00340  -0.0425   0.4685   0.5416
   1.500   0.3834   0.01036   0.00346  -0.0421   0.4600   0.5582
   1.750   0.4083   0.01041   0.00352  -0.0415   0.4504   0.5732
   2.000   0.4342   0.01045   0.00359  -0.0410   0.4428   0.5873
   2.250   0.4601   0.01050   0.00366  -0.0406   0.4350   0.6023
   2.500   0.4846   0.01058   0.00375  -0.0399   0.4275   0.6178
   2.750   0.5107   0.01061   0.00383  -0.0395   0.4200   0.6338
   3.000   0.5354   0.01070   0.00393  -0.0388   0.4114   0.6500
   3.250   0.5602   0.01076   0.00404  -0.0381   0.4040   0.6655
   3.500   0.5853   0.01084   0.00415  -0.0376   0.3965   0.6810
   4.000   0.6337   0.01102   0.00441  -0.0360   0.3813   0.7182
   4.250   0.6570   0.01113   0.00456  -0.0351   0.3732   0.7380
   4.500   0.6804   0.01124   0.00472  -0.0342   0.3662   0.7579
   4.750   0.7036   0.01134   0.00489  -0.0332   0.3583   0.7789
   5.000   0.7237   0.01150   0.00508  -0.0317   0.3503   0.8018
   5.250   0.7453   0.01160   0.00526  -0.0303   0.3426   0.8287
   5.500   0.7640   0.01178   0.00550  -0.0285   0.3339   0.8578
   5.750   0.7848   0.01196   0.00574  -0.0270   0.3263   0.8836
   6.000   0.8053   0.01219   0.00599  -0.0255   0.3180   0.9042
   6.250   0.8260   0.01246   0.00626  -0.0241   0.3107   0.9215
   6.500   0.8492   0.01271   0.00652  -0.0232   0.3026   0.9367
   6.750   0.8721   0.01305   0.00683  -0.0224   0.2941   0.9506
   7.000   0.8980   0.01333   0.00711  -0.0223   0.2849   0.9629
   7.250   0.9251   0.01372   0.00746  -0.0225   0.2753   0.9732
   7.500   0.9535   0.01411   0.00780  -0.0231   0.2641   0.9816
   7.750   0.9811   0.01453   0.00818  -0.0236   0.2534   0.9898
   8.000   1.0096   0.01502   0.00861  -0.0245   0.2428   0.9955
   8.250   1.0349   0.01547   0.00901  -0.0247   0.2333   1.0000
   8.500   1.0428   0.01586   0.00937  -0.0214   0.2265   1.0000
   8.750   1.0552   0.01628   0.00975  -0.0190   0.2193   1.0000
   9.000   1.0671   0.01682   0.01025  -0.0168   0.2121   1.0000
   9.250   1.0828   0.01729   0.01071  -0.0152   0.2055   1.0000
   9.500   1.0966   0.01790   0.01129  -0.0134   0.1995   1.0000
   9.750   1.1131   0.01842   0.01181  -0.0121   0.1944   1.0000
  10.000   1.1291   0.01901   0.01239  -0.0108   0.1889   1.0000
  10.250   1.1429   0.01974   0.01309  -0.0093   0.1836   1.0000
  10.500   1.1599   0.02033   0.01370  -0.0082   0.1787   1.0000
  10.750   1.1746   0.02106   0.01442  -0.0070   0.1731   1.0000
  11.000   1.1887   0.02187   0.01522  -0.0058   0.1680   1.0000
  11.250   1.2036   0.02265   0.01601  -0.0047   0.1624   1.0000
  11.500   1.2157   0.02364   0.01697  -0.0035   0.1571   1.0000
  11.750   1.2301   0.02451   0.01786  -0.0025   0.1518   1.0000
  12.000   1.2411   0.02562   0.01896  -0.0013   0.1463   1.0000
  12.250   1.2538   0.02667   0.02001  -0.0004   0.1414   1.0000
  12.500   1.2643   0.02789   0.02124   0.0006   0.1362   1.0000
  12.750   1.2746   0.02917   0.02252   0.0016   0.1318   1.0000
  13.000   1.2847   0.03049   0.02385   0.0025   0.1271   1.0000
  13.250   1.2926   0.03204   0.02540   0.0034   0.1231   1.0000
  13.500   1.3026   0.03346   0.02686   0.0041   0.1193   1.0000
  13.750   1.3103   0.03511   0.02852   0.0048   0.1155   1.0000
  14.000   1.3172   0.03686   0.03030   0.0054   0.1123   1.0000
  14.250   1.3248   0.03860   0.03207   0.0060   0.1087   1.0000
  14.500   1.3298   0.04063   0.03412   0.0065   0.1054   1.0000
  14.750   1.3356   0.04261   0.03613   0.0069   0.1024   1.0000
  15.000   1.3409   0.04469   0.03825   0.0072   0.0992   1.0000
  15.250   1.3433   0.04708   0.04067   0.0075   0.0962   1.0000
  15.500   1.3480   0.04930   0.04294   0.0077   0.0936   1.0000
  15.750   1.3514   0.05170   0.04538   0.0078   0.0909   1.0000
  16.000   1.3521   0.05440   0.04812   0.0079   0.0883   1.0000
  16.250   1.3543   0.05697   0.05074   0.0079   0.0860   1.0000
  16.500   1.3557   0.05968   0.05350   0.0078   0.0835   1.0000
  16.750   1.3548   0.06269   0.05655   0.0076   0.0811   1.0000
  17.000   1.3544   0.06567   0.05958   0.0073   0.0790   1.0000
  17.250   1.3539   0.06869   0.06266   0.0070   0.0768   1.0000
  17.500   1.3514   0.07199   0.06600   0.0066   0.0746   1.0000
  17.750   1.3481   0.07541   0.06947   0.0061   0.0727   1.0000
  18.000   1.3465   0.07868   0.07281   0.0055   0.0709   1.0000
  18.250   1.3434   0.08215   0.07634   0.0049   0.0691   1.0000
  18.500   1.3386   0.08584   0.08007   0.0041   0.0674   1.0000
  18.750   1.3338   0.08961   0.08391   0.0033   0.0661   1.0000
  19.000   1.3318   0.09304   0.08740   0.0024   0.0646   1.0000
  19.250   1.3275   0.09681   0.09124   0.0014   0.0632   1.0000
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