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NREL's S821 Airfoil (s821-nr) Xfoil prediction polar at RE=500,000 Ncrit=5


Details Polar file
Airfoil: NREL's S821 Airfoil (s821-nr)
Reynolds number: 500,000
Max Cl/Cd: 66.01 at α=6.25°
Description: Mach=0 Ncrit=5
Source: Xfoil prediction
Download polar: xf-s821-nr-500000-n5.txt
Download as CSV file: xf-s821-nr-500000-n5.csv

  
       XFOIL         Version 6.96
  
 Calculated polar for: NREL's S821 Airfoil                             
  
 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
  ------ -------- --------- --------- -------- -------- --------
 -13.750  -0.7845   0.09156   0.08716  -0.0461   0.9997   0.1737
 -13.500  -0.7643   0.09079   0.08641  -0.0469   0.9992   0.1741
 -13.000  -0.9512   0.05924   0.05420  -0.0635   0.9954   0.1835
 -12.750  -0.9305   0.05788   0.05285  -0.0656   0.9939   0.1843
 -12.500  -0.9091   0.05618   0.05115  -0.0685   0.9923   0.1851
 -12.250  -0.8873   0.05421   0.04917  -0.0720   0.9908   0.1860
 -12.000  -0.8768   0.05166   0.04659  -0.0746   0.9886   0.1870
 -11.750  -0.8697   0.04920   0.04409  -0.0765   0.9859   0.1880
 -11.500  -0.8631   0.04646   0.04130  -0.0790   0.9832   0.1890
 -11.250  -0.8524   0.04404   0.03883  -0.0817   0.9809   0.1900
 -11.000  -0.8407   0.04151   0.03623  -0.0849   0.9787   0.1909
 -10.750  -0.8246   0.03934   0.03400  -0.0881   0.9770   0.1918
 -10.500  -0.8074   0.03710   0.03169  -0.0918   0.9755   0.1927
 -10.250  -0.8072   0.03526   0.02980  -0.0915   0.9703   0.1933
 -10.000  -0.7974   0.03334   0.02782  -0.0930   0.9658   0.1939
  -9.750  -0.7792   0.03165   0.02607  -0.0955   0.9629   0.1944
  -9.500  -0.7551   0.03031   0.02470  -0.0982   0.9608   0.1952
  -9.250  -0.7281   0.02910   0.02351  -0.1011   0.9593   0.1963
  -9.000  -0.7360   0.02769   0.02210  -0.0984   0.9488   0.1971
  -8.750  -0.7146   0.02637   0.02077  -0.1005   0.9452   0.1979
  -8.500  -0.7124   0.02504   0.01942  -0.0993   0.9363   0.1986
  -8.250  -0.7028   0.02370   0.01806  -0.0994   0.9283   0.1993
  -8.000  -0.7084   0.02234   0.01666  -0.0969   0.9143   0.2000
  -7.750  -0.6853   0.02108   0.01538  -0.0987   0.9085   0.2007
  -7.500  -0.6726   0.01993   0.01418  -0.0988   0.8956   0.2014
  -7.250  -0.6376   0.01891   0.01311  -0.1022   0.8904   0.2023
  -7.000  -0.6060   0.01800   0.01216  -0.1049   0.8808   0.2031
  -6.750  -0.5617   0.01723   0.01134  -0.1095   0.8745   0.2040
  -6.500  -0.5120   0.01661   0.01066  -0.1147   0.8671   0.2048
  -6.250  -0.4612   0.01610   0.01008  -0.1200   0.8567   0.2057
  -6.000  -0.4172   0.01566   0.00955  -0.1239   0.8425   0.2064
  -5.750  -0.3812   0.01523   0.00904  -0.1263   0.8252   0.2075
  -5.500  -0.3509   0.01487   0.00861  -0.1276   0.8066   0.2087
  -5.250  -0.3238   0.01459   0.00825  -0.1282   0.7885   0.2096
  -5.000  -0.2975   0.01434   0.00794  -0.1284   0.7715   0.2105
  -4.750  -0.2713   0.01413   0.00766  -0.1286   0.7558   0.2114
  -4.250  -0.2190   0.01377   0.00718  -0.1287   0.7260   0.2132
  -4.000  -0.1927   0.01363   0.00697  -0.1287   0.7123   0.2142
  -3.750  -0.1662   0.01348   0.00677  -0.1287   0.6984   0.2151
  -3.500  -0.1391   0.01335   0.00658  -0.1287   0.6864   0.2161
  -3.250  -0.1120   0.01323   0.00640  -0.1287   0.6744   0.2170
  -3.000  -0.0845   0.01312   0.00624  -0.1288   0.6634   0.2179
  -2.750  -0.0572   0.01304   0.00610  -0.1287   0.6513   0.2188
  -2.500  -0.0296   0.01291   0.00594  -0.1288   0.6401   0.2200
  -2.250  -0.0018   0.01277   0.00578  -0.1289   0.6288   0.2215
  -2.000   0.0263   0.01266   0.00565  -0.1291   0.6193   0.2228
  -1.750   0.0549   0.01256   0.00554  -0.1292   0.6094   0.2241
  -1.250   0.1116   0.01241   0.00535  -0.1294   0.5901   0.2267
  -1.000   0.1395   0.01237   0.00526  -0.1293   0.5796   0.2281
  -0.750   0.1682   0.01232   0.00519  -0.1294   0.5706   0.2295
  -0.500   0.1968   0.01227   0.00513  -0.1294   0.5616   0.2308
  -0.250   0.2247   0.01227   0.00507  -0.1293   0.5531   0.2320
   0.000   0.2542   0.01220   0.00501  -0.1295   0.5452   0.2335
   0.250   0.2829   0.01215   0.00496  -0.1296   0.5360   0.2355
   0.500   0.3115   0.01213   0.00493  -0.1296   0.5277   0.2376
   0.750   0.3407   0.01209   0.00491  -0.1297   0.5195   0.2398
   1.000   0.3690   0.01210   0.00490  -0.1296   0.5117   0.2419
   1.250   0.3977   0.01211   0.00490  -0.1296   0.5046   0.2438
   1.500   0.4265   0.01211   0.00490  -0.1296   0.4966   0.2456
   1.750   0.4545   0.01214   0.00491  -0.1294   0.4886   0.2475
   2.000   0.4836   0.01213   0.00493  -0.1294   0.4820   0.2500
   2.250   0.5124   0.01214   0.00496  -0.1294   0.4741   0.2526
   2.500   0.5394   0.01221   0.00500  -0.1290   0.4646   0.2551
   2.750   0.5677   0.01224   0.00504  -0.1288   0.4552   0.2577
   3.000   0.5944   0.01233   0.00509  -0.1283   0.4451   0.2601
   3.250   0.6220   0.01239   0.00515  -0.1280   0.4358   0.2625
   3.500   0.6493   0.01245   0.00522  -0.1277   0.4258   0.2657
   3.750   0.6760   0.01253   0.00530  -0.1272   0.4172   0.2691
   4.000   0.7027   0.01261   0.00538  -0.1267   0.4077   0.2726
   4.250   0.7274   0.01274   0.00548  -0.1258   0.3978   0.2756
   4.500   0.7537   0.01282   0.00557  -0.1252   0.3876   0.2784
   4.750   0.7783   0.01296   0.00569  -0.1244   0.3778   0.2819
   5.000   0.8046   0.01305   0.00581  -0.1238   0.3682   0.2855
   5.250   0.8282   0.01323   0.00596  -0.1227   0.3578   0.2890
   5.500   0.8537   0.01336   0.00610  -0.1220   0.3471   0.2922
   5.750   0.8771   0.01357   0.00627  -0.1209   0.3353   0.2952
   6.000   0.9013   0.01377   0.00647  -0.1200   0.3214   0.2991
   6.250   0.9248   0.01401   0.00669  -0.1190   0.3062   0.3031
   6.500   0.9464   0.01434   0.00696  -0.1177   0.2879   0.3071
   6.750   0.9662   0.01475   0.00727  -0.1161   0.2664   0.3106
   7.000   0.9849   0.01523   0.00765  -0.1144   0.2431   0.3145
   7.250   1.0033   0.01574   0.00808  -0.1127   0.2205   0.3188
   7.500   1.0212   0.01628   0.00853  -0.1110   0.2005   0.3228
   7.750   1.0386   0.01682   0.00899  -0.1091   0.1833   0.3266
   8.000   1.0558   0.01737   0.00947  -0.1073   0.1677   0.3298
   8.250   1.0731   0.01794   0.00998  -0.1056   0.1529   0.3338
   8.500   1.0893   0.01854   0.01054  -0.1037   0.1393   0.3381
   8.750   1.1057   0.01914   0.01109  -0.1019   0.1276   0.3427
   9.000   1.1223   0.01974   0.01166  -0.1001   0.1174   0.3470
   9.250   1.1387   0.02034   0.01224  -0.0983   0.1094   0.3511
   9.500   1.1549   0.02096   0.01287  -0.0966   0.1023   0.3561
   9.750   1.1701   0.02164   0.01356  -0.0949   0.0958   0.3612
  10.000   1.1855   0.02232   0.01425  -0.0931   0.0900   0.3661
  10.500   1.2138   0.02389   0.01583  -0.0896   0.0798   0.3754
  10.750   1.2283   0.02468   0.01666  -0.0880   0.0754   0.3809
  11.000   1.2409   0.02561   0.01760  -0.0863   0.0715   0.3862
  11.250   1.2534   0.02657   0.01858  -0.0846   0.0675   0.3905
  11.500   1.2655   0.02761   0.01965  -0.0831   0.0639   0.3954
  11.750   1.2771   0.02872   0.02080  -0.0816   0.0604   0.4009
  12.000   1.2880   0.02991   0.02203  -0.0801   0.0573   0.4064
  12.250   1.2981   0.03121   0.02335  -0.0787   0.0543   0.4114
  12.500   1.3082   0.03256   0.02474  -0.0774   0.0516   0.4160
  12.750   1.3175   0.03404   0.02627  -0.0763   0.0490   0.4214
  13.000   1.3263   0.03561   0.02789  -0.0752   0.0467   0.4272
  13.250   1.3348   0.03726   0.02959  -0.0742   0.0443   0.4327
  13.500   1.3421   0.03908   0.03144  -0.0732   0.0423   0.4376
  13.750   1.3497   0.04094   0.03338  -0.0725   0.0402   0.4434
  14.000   1.3556   0.04303   0.03552  -0.0718   0.0383   0.4490
  14.250   1.3629   0.04505   0.03760  -0.0712   0.0367   0.4546
  14.500   1.3682   0.04733   0.03992  -0.0708   0.0351   0.4597
  14.750   1.3728   0.04977   0.04244  -0.0705   0.0336   0.4659
  15.000   1.3785   0.05216   0.04491  -0.0703   0.0322   0.4726
  15.250   1.3824   0.05480   0.04761  -0.0702   0.0309   0.4786
  15.500   1.3849   0.05767   0.05053  -0.0702   0.0298   0.4835
  15.750   1.3892   0.06043   0.05338  -0.0704   0.0287   0.4898
  16.000   1.3925   0.06336   0.05640  -0.0707   0.0277   0.4968
  16.250   1.3940   0.06659   0.05971  -0.0711   0.0267   0.5032
  16.500   1.3956   0.06987   0.06306  -0.0716   0.0260   0.5094
  16.750   1.3982   0.07310   0.06639  -0.0722   0.0251   0.5164
  17.000   1.3992   0.07662   0.06999  -0.0730   0.0244   0.5232
  17.250   1.4000   0.08020   0.07365  -0.0739   0.0236   0.5298
  17.500   1.3998   0.08402   0.07756  -0.0750   0.0230   0.5366
  17.750   1.3993   0.08793   0.08157  -0.0761   0.0225   0.5444
  18.000   1.4004   0.09165   0.08538  -0.0773   0.0219   0.5521
  18.250   1.3998   0.09570   0.08953  -0.0787   0.0214   0.5593
  18.500   1.3993   0.09976   0.09369  -0.0801   0.0208   0.5672
  18.750   1.3979   0.10396   0.09798  -0.0817   0.0203   0.5749
  19.000   1.3954   0.10842   0.10254  -0.0835   0.0199   0.5826
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