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NACA 2421 (naca2421-il) Xfoil prediction polar at RE=500,000 Ncrit=9


Details Polar file
Airfoil: NACA 2421 (naca2421-il)
Reynolds number: 500,000
Max Cl/Cd: 75.51 at α=7.75°
Description: Mach=0 Ncrit=9
Source: Xfoil prediction
Download polar: xf-naca2421-il-500000.txt
Download as CSV file: xf-naca2421-il-500000.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 =   9.000
  
   alpha    CL        CD       CDp       CM     Top_Xtr  Bot_Xtr
  ------ -------- --------- --------- -------- -------- --------
 -19.750  -1.1138   0.08316   0.07818  -0.0688   1.0000   0.0633
 -19.500  -1.1181   0.07931   0.07423  -0.0705   1.0000   0.0640
 -19.250  -1.1223   0.07550   0.07030  -0.0722   1.0000   0.0647
 -19.000  -1.1214   0.07272   0.06750  -0.0730   1.0000   0.0655
 -18.750  -1.1202   0.06996   0.06474  -0.0739   1.0000   0.0663
 -18.500  -1.1211   0.06681   0.06155  -0.0751   1.0000   0.0671
 -18.250  -1.1219   0.06368   0.05837  -0.0762   1.0000   0.0679
 -18.000  -1.1221   0.06066   0.05529  -0.0773   1.0000   0.0688
 -17.750  -1.1223   0.05767   0.05221  -0.0783   1.0000   0.0698
 -17.500  -1.1220   0.05474   0.04918  -0.0793   1.0000   0.0707
 -17.250  -1.1219   0.05203   0.04641  -0.0799   1.0000   0.0716
 -17.000  -1.1224   0.04938   0.04376  -0.0803   1.0000   0.0726
 -16.750  -1.1215   0.04682   0.04118  -0.0808   1.0000   0.0736
 -16.500  -1.1193   0.04445   0.03875  -0.0811   1.0000   0.0746
 -16.250  -1.1165   0.04223   0.03647  -0.0813   1.0000   0.0757
 -16.000  -1.1127   0.04017   0.03433  -0.0814   1.0000   0.0768
 -15.750  -1.1075   0.03831   0.03237  -0.0812   1.0000   0.0777
 -15.500  -1.1095   0.03608   0.03015  -0.0805   1.0000   0.0789
 -15.250  -1.1092   0.03418   0.02823  -0.0797   1.0000   0.0800
 -15.000  -1.1074   0.03257   0.02660  -0.0785   1.0000   0.0812
 -14.750  -1.1056   0.03118   0.02515  -0.0770   1.0000   0.0825
 -14.500  -1.1041   0.02995   0.02387  -0.0750   1.0000   0.0838
 -14.250  -1.1032   0.02892   0.02276  -0.0726   1.0000   0.0848
 -14.000  -1.1140   0.02756   0.02140  -0.0688   1.0000   0.0860
 -13.750  -1.1244   0.02652   0.02035  -0.0645   1.0000   0.0870
 -13.500  -1.1354   0.02568   0.01949  -0.0598   1.0000   0.0880
 -13.250  -1.1376   0.02491   0.01869  -0.0563   0.9995   0.0893
 -13.000  -1.1109   0.02407   0.01779  -0.0577   0.9972   0.0915
 -12.750  -1.0864   0.02308   0.01678  -0.0589   0.9945   0.0939
 -12.500  -1.0597   0.02221   0.01592  -0.0604   0.9923   0.0965
 -12.250  -1.0327   0.02157   0.01523  -0.0614   0.9892   0.0993
 -12.000  -1.0076   0.02082   0.01447  -0.0621   0.9852   0.1021
 -11.750  -0.9793   0.02010   0.01377  -0.0633   0.9821   0.1053
 -11.500  -0.9455   0.01958   0.01321  -0.0652   0.9801   0.1090
 -11.250  -0.9128   0.01884   0.01250  -0.0672   0.9783   0.1130
 -11.000  -0.8882   0.01833   0.01199  -0.0671   0.9722   0.1167
 -10.750  -0.8555   0.01775   0.01140  -0.0687   0.9689   0.1210
 -10.500  -0.8230   0.01717   0.01086  -0.0702   0.9661   0.1257
 -10.250  -0.7888   0.01672   0.01037  -0.0718   0.9638   0.1304
 -10.000  -0.7721   0.01625   0.00994  -0.0700   0.9555   0.1346
  -9.750  -0.7434   0.01587   0.00954  -0.0704   0.9509   0.1395
  -9.500  -0.7173   0.01539   0.00907  -0.0703   0.9463   0.1443
  -9.250  -0.6983   0.01506   0.00875  -0.0687   0.9376   0.1488
  -9.000  -0.6715   0.01477   0.00840  -0.0684   0.9321   0.1533
  -8.750  -0.6521   0.01434   0.00802  -0.0670   0.9240   0.1585
  -8.500  -0.6288   0.01405   0.00770  -0.0661   0.9163   0.1636
  -8.250  -0.6043   0.01372   0.00736  -0.0654   0.9099   0.1687
  -8.000  -0.5833   0.01341   0.00708  -0.0641   0.9005   0.1742
  -7.750  -0.5572   0.01318   0.00679  -0.0636   0.8932   0.1797
  -7.500  -0.5357   0.01286   0.00651  -0.0625   0.8839   0.1861
  -7.250  -0.5107   0.01262   0.00625  -0.0618   0.8756   0.1927
  -7.000  -0.4867   0.01236   0.00601  -0.0611   0.8669   0.2001
  -6.750  -0.4619   0.01215   0.00580  -0.0604   0.8573   0.2080
  -6.500  -0.4370   0.01191   0.00557  -0.0598   0.8485   0.2169
  -6.000  -0.3862   0.01154   0.00519  -0.0586   0.8293   0.2362
  -5.750  -0.3609   0.01139   0.00505  -0.0580   0.8185   0.2458
  -5.500  -0.3348   0.01124   0.00487  -0.0576   0.8089   0.2560
  -5.250  -0.3093   0.01109   0.00474  -0.0570   0.7978   0.2653
  -5.000  -0.2831   0.01098   0.00458  -0.0566   0.7874   0.2750
  -4.750  -0.2573   0.01085   0.00446  -0.0560   0.7758   0.2837
  -4.500  -0.2313   0.01075   0.00433  -0.0555   0.7647   0.2932
  -4.250  -0.2051   0.01066   0.00422  -0.0551   0.7527   0.3020
  -4.000  -0.1793   0.01055   0.00410  -0.0546   0.7420   0.3120
  -3.750  -0.1527   0.01048   0.00401  -0.0542   0.7305   0.3209
  -3.500  -0.1271   0.01037   0.00391  -0.0536   0.7198   0.3310
  -3.000  -0.0750   0.01021   0.00373  -0.0527   0.6977   0.3510
  -2.500  -0.0229   0.01007   0.00359  -0.0517   0.6764   0.3743
  -2.250   0.0032   0.01000   0.00353  -0.0513   0.6654   0.3875
  -2.000   0.0292   0.00995   0.00348  -0.0508   0.6551   0.4023
  -1.750   0.0546   0.00986   0.00343  -0.0502   0.6440   0.4193
  -1.500   0.0801   0.00980   0.00340  -0.0496   0.6337   0.4379
  -1.250   0.1057   0.00973   0.00338  -0.0491   0.6233   0.4576
  -1.000   0.1313   0.00970   0.00336  -0.0485   0.6139   0.4778
  -0.750   0.1572   0.00964   0.00337  -0.0481   0.6042   0.4987
  -0.500   0.1827   0.00965   0.00337  -0.0475   0.5949   0.5196
  -0.250   0.2091   0.00961   0.00340  -0.0470   0.5862   0.5395
   0.000   0.2347   0.00963   0.00342  -0.0465   0.5767   0.5599
   0.250   0.2605   0.00962   0.00346  -0.0459   0.5674   0.5815
   0.500   0.2857   0.00962   0.00349  -0.0453   0.5574   0.6020
   0.750   0.3113   0.00964   0.00354  -0.0447   0.5484   0.6198
   1.000   0.3372   0.00965   0.00358  -0.0442   0.5391   0.6366
   1.250   0.3626   0.00973   0.00364  -0.0436   0.5302   0.6535
   1.500   0.3888   0.00971   0.00370  -0.0431   0.5215   0.6708
   1.750   0.4139   0.00977   0.00376  -0.0424   0.5125   0.6871
   2.000   0.4399   0.00981   0.00384  -0.0419   0.5047   0.7039
   2.250   0.4657   0.00985   0.00392  -0.0414   0.4966   0.7217
   2.750   0.5161   0.00994   0.00412  -0.0400   0.4809   0.7598
   3.000   0.5407   0.01002   0.00422  -0.0393   0.4724   0.7790
   3.250   0.5656   0.01011   0.00435  -0.0385   0.4648   0.7979
   3.500   0.5906   0.01018   0.00447  -0.0378   0.4568   0.8170
   3.750   0.6139   0.01032   0.00461  -0.0367   0.4486   0.8364
   4.000   0.6385   0.01039   0.00476  -0.0359   0.4409   0.8552
   4.250   0.6617   0.01053   0.00492  -0.0348   0.4327   0.8730
   4.500   0.6846   0.01069   0.00509  -0.0336   0.4250   0.8898
   4.750   0.7075   0.01083   0.00525  -0.0324   0.4168   0.9064
   5.000   0.7281   0.01106   0.00544  -0.0308   0.4086   0.9229
   5.250   0.7523   0.01123   0.00565  -0.0298   0.4005   0.9380
   5.500   0.7767   0.01150   0.00589  -0.0289   0.3916   0.9526
   5.750   0.8056   0.01176   0.00615  -0.0291   0.3832   0.9647
   6.000   0.8391   0.01208   0.00642  -0.0303   0.3740   0.9727
   6.250   0.8739   0.01239   0.00670  -0.0319   0.3654   0.9789
   6.500   0.9138   0.01272   0.00699  -0.0347   0.3557   0.9821
   6.750   0.9512   0.01305   0.00729  -0.0369   0.3464   0.9864
   7.000   0.9854   0.01338   0.00758  -0.0385   0.3368   0.9914
   7.250   1.0231   0.01370   0.00787  -0.0410   0.3269   0.9942
   7.500   1.0586   0.01406   0.00818  -0.0430   0.3161   0.9978
   7.750   1.0813   0.01432   0.00842  -0.0425   0.3071   1.0000
   8.000   1.0744   0.01444   0.00852  -0.0361   0.3004   1.0000
   8.250   1.0727   0.01466   0.00871  -0.0308   0.2932   1.0000
   8.500   1.0794   0.01489   0.00893  -0.0271   0.2845   1.0000
   8.750   1.0865   0.01527   0.00925  -0.0236   0.2754   1.0000
   9.000   1.0986   0.01566   0.00961  -0.0211   0.2654   1.0000
   9.250   1.1117   0.01613   0.01004  -0.0190   0.2562   1.0000
   9.500   1.1247   0.01668   0.01054  -0.0169   0.2474   1.0000
   9.750   1.1396   0.01722   0.01105  -0.0153   0.2396   1.0000
  10.000   1.1529   0.01787   0.01166  -0.0135   0.2321   1.0000
  10.250   1.1676   0.01850   0.01228  -0.0120   0.2255   1.0000
  10.500   1.1821   0.01917   0.01295  -0.0105   0.2189   1.0000
  10.750   1.1937   0.02003   0.01376  -0.0088   0.2127   1.0000
  11.000   1.2104   0.02065   0.01441  -0.0078   0.2071   1.0000
  11.250   1.2228   0.02153   0.01527  -0.0063   0.2013   1.0000
  11.500   1.2361   0.02240   0.01614  -0.0051   0.1959   1.0000
  11.750   1.2510   0.02320   0.01696  -0.0041   0.1903   1.0000
  12.000   1.2610   0.02432   0.01805  -0.0027   0.1848   1.0000
  12.250   1.2756   0.02520   0.01896  -0.0018   0.1797   1.0000
  12.500   1.2877   0.02626   0.02003  -0.0007   0.1742   1.0000
  12.750   1.2968   0.02756   0.02132   0.0004   0.1691   1.0000
  13.000   1.3101   0.02860   0.02240   0.0012   0.1639   1.0000
  13.250   1.3179   0.03007   0.02385   0.0022   0.1588   1.0000
  13.500   1.3286   0.03138   0.02520   0.0030   0.1541   1.0000
  13.750   1.3375   0.03286   0.02669   0.0038   0.1491   1.0000
  14.000   1.3430   0.03466   0.02849   0.0047   0.1446   1.0000
  14.250   1.3525   0.03618   0.03005   0.0052   0.1400   1.0000
  14.500   1.3565   0.03820   0.03207   0.0059   0.1356   1.0000
  14.750   1.3631   0.04005   0.03395   0.0065   0.1316   1.0000
  15.000   1.3683   0.04207   0.03601   0.0069   0.1274   1.0000
  15.250   1.3679   0.04465   0.03858   0.0074   0.1236   1.0000
  15.500   1.3751   0.04655   0.04054   0.0077   0.1200   1.0000
  15.750   1.3770   0.04903   0.04304   0.0079   0.1164   1.0000
  16.000   1.3748   0.05196   0.04599   0.0081   0.1132   1.0000
  16.250   1.3799   0.05418   0.04828   0.0082   0.1098   1.0000
  16.500   1.3793   0.05703   0.05116   0.0082   0.1066   1.0000
  16.750   1.3753   0.06029   0.05444   0.0081   0.1036   1.0000
  17.000   1.3781   0.06287   0.05709   0.0080   0.1005   1.0000
  17.250   1.3758   0.06604   0.06029   0.0077   0.0976   1.0000
  17.500   1.3701   0.06962   0.06390   0.0074   0.0950   1.0000
  17.750   1.3713   0.07247   0.06683   0.0070   0.0922   1.0000
  18.000   1.3680   0.07587   0.07026   0.0065   0.0896   1.0000
  18.250   1.3595   0.07992   0.07432   0.0059   0.0874   1.0000
  18.500   1.3607   0.08284   0.07733   0.0053   0.0851   1.0000
  18.750   1.3573   0.08635   0.08090   0.0046   0.0829   1.0000
  19.000   1.3506   0.09032   0.08488   0.0037   0.0810   1.0000
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