Airfoil Tools
Search 1636 airfoils Google+
You have 0 airfoils loaded.
Your Reynold number range is 50,000 to 1,000,000. (set)

NACA 2421 (naca2421-il) Xfoil prediction polar at RE=200,000 Ncrit=5


Details Polar file
Airfoil: NACA 2421 (naca2421-il)
Reynolds number: 200,000
Max Cl/Cd: 53.32 at α=7.25°
Description: Mach=0 Ncrit=5
Source: Xfoil prediction
Download polar: xf-naca2421-il-200000-n5.txt
Download as CSV file: xf-naca2421-il-200000-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 =     0.200 e 6     Ncrit =   5.000
  
   alpha    CL        CD       CDp       CM     Top_Xtr  Bot_Xtr
  ------ -------- --------- --------- -------- -------- --------
 -19.250  -0.9337   0.10200   0.09591  -0.0615   1.0000   0.0683
 -19.000  -0.9466   0.09656   0.09034  -0.0643   1.0000   0.0693
 -18.750  -0.9603   0.09107   0.08469  -0.0670   1.0000   0.0704
 -18.500  -0.9683   0.08660   0.08012  -0.0691   1.0000   0.0714
 -18.250  -0.9680   0.08350   0.07701  -0.0703   1.0000   0.0722
 -18.000  -0.9707   0.07994   0.07341  -0.0719   1.0000   0.0732
 -17.750  -0.9747   0.07622   0.06961  -0.0735   1.0000   0.0742
 -17.500  -0.9790   0.07252   0.06583  -0.0750   1.0000   0.0753
 -17.250  -0.9832   0.06890   0.06209  -0.0764   1.0000   0.0764
 -17.000  -0.9869   0.06540   0.05845  -0.0777   1.0000   0.0776
 -16.750  -0.9872   0.06254   0.05559  -0.0785   1.0000   0.0785
 -16.500  -0.9882   0.05963   0.05265  -0.0793   1.0000   0.0796
 -16.250  -0.9895   0.05674   0.04970  -0.0801   1.0000   0.0807
 -16.000  -0.9903   0.05399   0.04687  -0.0807   1.0000   0.0820
 -15.750  -0.9905   0.05140   0.04419  -0.0811   1.0000   0.0834
 -15.500  -0.9900   0.04897   0.04165  -0.0813   1.0000   0.0847
 -15.250  -0.9902   0.04666   0.03935  -0.0812   1.0000   0.0859
 -15.000  -0.9904   0.04447   0.03713  -0.0810   1.0000   0.0871
 -14.750  -0.9901   0.04244   0.03505  -0.0805   1.0000   0.0885
 -14.500  -0.9895   0.04058   0.03314  -0.0797   1.0000   0.0900
 -14.250  -0.9887   0.03891   0.03139  -0.0786   1.0000   0.0916
 -14.000  -0.9893   0.03733   0.02976  -0.0771   1.0000   0.0930
 -13.750  -0.9920   0.03579   0.02823  -0.0752   1.0000   0.0943
 -13.500  -0.9950   0.03445   0.02686  -0.0729   1.0000   0.0957
 -13.250  -0.9985   0.03329   0.02566  -0.0701   1.0000   0.0973
 -13.000  -1.0028   0.03227   0.02459  -0.0669   1.0000   0.0989
 -12.750  -1.0078   0.03139   0.02364  -0.0633   1.0000   0.1005
 -12.500  -1.0075   0.03035   0.02261  -0.0608   0.9988   0.1021
 -12.250  -0.9863   0.02922   0.02145  -0.0620   0.9948   0.1048
 -12.000  -0.9618   0.02828   0.02044  -0.0633   0.9916   0.1080
 -11.750  -0.9410   0.02734   0.01947  -0.0637   0.9863   0.1109
 -11.500  -0.9181   0.02646   0.01858  -0.0645   0.9817   0.1141
 -11.250  -0.8903   0.02572   0.01777  -0.0658   0.9784   0.1180
 -11.000  -0.8710   0.02498   0.01702  -0.0655   0.9716   0.1212
 -10.750  -0.8454   0.02427   0.01630  -0.0662   0.9669   0.1251
 -10.500  -0.8138   0.02365   0.01560  -0.0678   0.9638   0.1297
 -10.250  -0.7968   0.02301   0.01499  -0.0666   0.9553   0.1332
 -10.000  -0.7692   0.02241   0.01436  -0.0673   0.9500   0.1379
  -9.750  -0.7445   0.02186   0.01377  -0.0672   0.9437   0.1422
  -9.500  -0.7232   0.02131   0.01323  -0.0665   0.9356   0.1466
  -9.250  -0.6933   0.02079   0.01266  -0.0673   0.9309   0.1519
  -9.000  -0.6749   0.02033   0.01221  -0.0659   0.9218   0.1561
  -8.750  -0.6499   0.01985   0.01172  -0.0657   0.9152   0.1614
  -8.500  -0.6228   0.01941   0.01124  -0.0657   0.9093   0.1668
  -8.250  -0.6039   0.01900   0.01087  -0.0643   0.8997   0.1719
  -8.000  -0.5763   0.01858   0.01041  -0.0644   0.8936   0.1782
  -7.750  -0.5554   0.01822   0.01007  -0.0632   0.8845   0.1838
  -7.500  -0.5309   0.01785   0.00970  -0.0627   0.8765   0.1907
  -7.250  -0.5052   0.01749   0.00933  -0.0623   0.8691   0.1977
  -7.000  -0.4830   0.01720   0.00905  -0.0613   0.8592   0.2052
  -6.750  -0.4560   0.01686   0.00870  -0.0611   0.8520   0.2132
  -6.500  -0.4335   0.01662   0.00846  -0.0601   0.8418   0.2216
  -6.250  -0.4076   0.01633   0.00816  -0.0597   0.8330   0.2302
  -6.000  -0.3831   0.01611   0.00793  -0.0590   0.8236   0.2395
  -5.750  -0.3581   0.01586   0.00768  -0.0584   0.8140   0.2483
  -5.500  -0.3322   0.01566   0.00745  -0.0580   0.8046   0.2582
  -5.250  -0.3078   0.01544   0.00724  -0.0573   0.7941   0.2673
  -5.000  -0.2814   0.01527   0.00702  -0.0569   0.7847   0.2774
  -4.750  -0.2570   0.01507   0.00684  -0.0561   0.7738   0.2863
  -4.500  -0.2306   0.01492   0.00663  -0.0557   0.7640   0.2962
  -4.250  -0.2059   0.01475   0.00647  -0.0550   0.7527   0.3048
  -4.000  -0.1798   0.01460   0.00628  -0.0545   0.7426   0.3144
  -3.750  -0.1548   0.01446   0.00614  -0.0539   0.7309   0.3235
  -3.500  -0.1292   0.01433   0.00598  -0.0533   0.7203   0.3336
  -3.250  -0.1040   0.01422   0.00586  -0.0527   0.7086   0.3432
  -3.000  -0.0786   0.01410   0.00573  -0.0521   0.6978   0.3542
  -2.750  -0.0535   0.01400   0.00562  -0.0515   0.6863   0.3653
  -2.500  -0.0281   0.01390   0.00552  -0.0509   0.6760   0.3777
  -2.250  -0.0032   0.01380   0.00544  -0.0502   0.6650   0.3903
  -2.000   0.0223   0.01374   0.00536  -0.0496   0.6552   0.4046
  -1.750   0.0470   0.01365   0.00531  -0.0489   0.6444   0.4200
  -1.500   0.0721   0.01358   0.00526  -0.0482   0.6347   0.4363
  -1.250   0.0969   0.01351   0.00524  -0.0475   0.6245   0.4538
  -0.750   0.1465   0.01341   0.00524  -0.0461   0.6064   0.4973
  -0.500   0.1712   0.01338   0.00524  -0.0454   0.5972   0.5199
  -0.250   0.1963   0.01336   0.00527  -0.0447   0.5882   0.5396
   0.000   0.2215   0.01337   0.00528  -0.0440   0.5787   0.5581
   0.250   0.2467   0.01338   0.00532  -0.0434   0.5705   0.5762
   0.500   0.2720   0.01338   0.00538  -0.0427   0.5620   0.5933
   0.750   0.2975   0.01342   0.00541  -0.0421   0.5542   0.6096
   1.000   0.3230   0.01346   0.00549  -0.0415   0.5464   0.6269
   1.250   0.3479   0.01349   0.00557  -0.0408   0.5378   0.6442
   1.500   0.3729   0.01355   0.00563  -0.0401   0.5295   0.6614
   1.750   0.3976   0.01360   0.00573  -0.0393   0.5200   0.6787
   2.000   0.4220   0.01369   0.00581  -0.0385   0.5107   0.6959
   2.250   0.4461   0.01374   0.00594  -0.0376   0.5005   0.7136
   2.500   0.4700   0.01384   0.00605  -0.0366   0.4910   0.7321
   2.750   0.4945   0.01393   0.00619  -0.0358   0.4829   0.7511
   3.000   0.5187   0.01403   0.00634  -0.0349   0.4746   0.7703
   3.250   0.5427   0.01417   0.00649  -0.0340   0.4671   0.7898
   3.500   0.5670   0.01429   0.00669  -0.0331   0.4587   0.8093
   3.750   0.5909   0.01445   0.00687  -0.0321   0.4509   0.8288
   4.000   0.6153   0.01463   0.00709  -0.0312   0.4435   0.8487
   4.250   0.6397   0.01482   0.00732  -0.0303   0.4350   0.8695
   4.500   0.6644   0.01507   0.00755  -0.0295   0.4274   0.8896
   4.750   0.6907   0.01529   0.00781  -0.0290   0.4191   0.9076
   5.000   0.7168   0.01555   0.00805  -0.0286   0.4109   0.9228
   5.250   0.7475   0.01583   0.00832  -0.0292   0.4025   0.9342
   5.500   0.7753   0.01611   0.00858  -0.0293   0.3935   0.9465
   5.750   0.8061   0.01642   0.00886  -0.0301   0.3851   0.9567
   6.000   0.8374   0.01674   0.00916  -0.0310   0.3754   0.9657
   6.250   0.8680   0.01710   0.00947  -0.0319   0.3663   0.9750
   6.500   0.9020   0.01746   0.00981  -0.0336   0.3558   0.9815
   6.750   0.9343   0.01784   0.01016  -0.0350   0.3462   0.9889
   7.000   0.9663   0.01822   0.01051  -0.0364   0.3359   0.9951
   7.250   0.9901   0.01857   0.01084  -0.0362   0.3274   1.0000
   7.500   0.9892   0.01874   0.01100  -0.0311   0.3206   1.0000
   7.750   0.9898   0.01901   0.01121  -0.0264   0.3139   1.0000
   8.000   0.9970   0.01928   0.01149  -0.0229   0.3067   1.0000
   8.250   1.0044   0.01965   0.01183  -0.0196   0.2990   1.0000
   8.500   1.0143   0.02007   0.01223  -0.0168   0.2915   1.0000
   8.750   1.0259   0.02053   0.01269  -0.0145   0.2831   1.0000
   9.000   1.0369   0.02109   0.01320  -0.0122   0.2755   1.0000
   9.250   1.0499   0.02163   0.01375  -0.0103   0.2669   1.0000
   9.500   1.0607   0.02231   0.01440  -0.0082   0.2593   1.0000
   9.750   1.0739   0.02297   0.01505  -0.0065   0.2511   1.0000
  10.000   1.0838   0.02380   0.01584  -0.0046   0.2438   1.0000
  10.250   1.0965   0.02456   0.01661  -0.0031   0.2362   1.0000
  10.500   1.1054   0.02555   0.01755  -0.0013   0.2292   1.0000
  10.750   1.1176   0.02643   0.01845   0.0001   0.2223   1.0000
  11.000   1.1269   0.02751   0.01950   0.0016   0.2157   1.0000
  11.250   1.1375   0.02857   0.02057   0.0029   0.2099   1.0000
  11.500   1.1481   0.02967   0.02169   0.0041   0.2039   1.0000
  11.750   1.1555   0.03099   0.02299   0.0055   0.1986   1.0000
  12.000   1.1672   0.03210   0.02415   0.0064   0.1932   1.0000
  12.250   1.1760   0.03344   0.02551   0.0074   0.1877   1.0000
  12.500   1.1829   0.03494   0.02701   0.0085   0.1830   1.0000
  12.750   1.1933   0.03626   0.02839   0.0092   0.1776   1.0000
  13.000   1.1999   0.03789   0.03004   0.0100   0.1725   1.0000
  13.250   1.2070   0.03954   0.03172   0.0108   0.1679   1.0000
  13.500   1.2147   0.04121   0.03344   0.0113   0.1627   1.0000
  13.750   1.2187   0.04322   0.03546   0.0119   0.1582   1.0000
  14.000   1.2257   0.04504   0.03733   0.0124   0.1535   1.0000
  14.250   1.2303   0.04712   0.03945   0.0127   0.1488   1.0000
  14.500   1.2326   0.04946   0.04181   0.0130   0.1448   1.0000
  14.750   1.2381   0.05157   0.04398   0.0132   0.1403   1.0000
  15.000   1.2400   0.05405   0.04650   0.0133   0.1362   1.0000
  15.250   1.2418   0.05661   0.04909   0.0133   0.1325   1.0000
  15.500   1.2446   0.05912   0.05167   0.0133   0.1284   1.0000
  15.750   1.2443   0.06200   0.05457   0.0131   0.1249   1.0000
  16.000   1.2452   0.06479   0.05742   0.0129   0.1215   1.0000
  16.250   1.2461   0.06763   0.06033   0.0126   0.1179   1.0000
  16.500   1.2443   0.07082   0.06354   0.0122   0.1148   1.0000
  16.750   1.2437   0.07391   0.06668   0.0117   0.1118   1.0000
  17.000   1.2436   0.07699   0.06984   0.0112   0.1086   1.0000
  17.250   1.2409   0.08041   0.07330   0.0105   0.1057   1.0000
  17.500   1.2384   0.08383   0.07676   0.0098   0.1032   1.0000
  17.750   1.2380   0.08705   0.08007   0.0090   0.1003   1.0000
  18.000   1.2349   0.09065   0.08373   0.0081   0.0976   1.0000
  18.250   1.2307   0.09438   0.08747   0.0071   0.0954   1.0000
  18.500   1.2299   0.09775   0.09094   0.0061   0.0928   1.0000
  18.750   1.2269   0.10144   0.09470   0.0049   0.0903   1.0000
  19.000   1.2235   0.10517   0.09846   0.0037   0.0882   1.0000
<< Back to NACA 2421 (naca2421-il)

Polar data table (+)

Polar graphs


<< Back to NACA 2421 (naca2421-il)