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NREL's S809 Airfoil (s809-nr)

NREL's S809 Airfoil - NREL HAWT airfoil S809 primary 21.0% Re=2.0E+6 Clmax(S)=1.00 Restrained max lift coef


Airfoil s809-nr
Details Dat file Parser  
(s809-nr) NREL's S809 Airfoil
NREL HAWT airfoil S809 primary 21.0% Re=2.0E+6 Clmax(S)=1.00 Restrained max lift coef
Max thickness 21% at 39.5% chord.
Max camber 1% at 82.3% chord
Source NWTC National WInd Technology Center
Source dat file
The dat file is in Selig format
NREL's S809 Airfoil
   x/c        y/c
1.000000   0.000000
0.996203   0.000487
0.985190   0.002373
0.967844   0.005960
0.945073   0.011024
0.917488   0.017033
0.885293   0.023458
0.848455   0.030280
0.807470   0.037766
0.763042   0.045974
0.715952   0.054872
0.667064   0.064353
0.617331   0.074214
0.567830   0.084095
0.519832   0.093268
0.474243   0.099392
0.428461   0.101760
0.382612   0.101840
0.337260   0.100070
0.292970   0.096703
0.250247   0.091908
0.209576   0.085851
0.171409   0.078687
0.136174   0.070580
0.104263   0.061697
0.076035   0.052224
0.051823   0.042352
0.031910   0.032299
0.016590   0.022290
0.006026   0.012615
0.000658   0.003723
0.000204   0.001942
0.000000  -0.000020
0.000213  -0.001794
0.001045  -0.003477
0.001208  -0.003724
0.002398  -0.005266
0.009313  -0.011499
0.023230  -0.020399
0.042320  -0.030269
0.065877  -0.040821
0.093426  -0.051923
0.124111  -0.063082
0.157653  -0.073730
0.193738  -0.083567
0.231914  -0.092442
0.271438  -0.099905
0.311968  -0.105281
0.353370  -0.108181
0.395329  -0.108011
0.438273  -0.104552
0.481920  -0.097347
0.527928  -0.086571
0.576211  -0.073979
0.626092  -0.060644
0.676744  -0.047441
0.727211  -0.035100
0.776432  -0.024204
0.823285  -0.015163
0.866630  -0.008204
0.905365  -0.003363
0.938474  -0.000487
0.965086   0.000743
0.984478   0.000775
0.996141   0.000290
1.000000   0.000000
Dat file parser warnings
  • Line 2 - Invalid characters : x/c y/c
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Polars for NREL's S809 Airfoil (s809-nr)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   s809-nr50,000915.5 at α=12.25°Mach=0 Ncrit=9Xfoil predictionDetails
   s809-nr50,000513.9 at α=10.75°Mach=0 Ncrit=5Xfoil predictionDetails
   s809-nr100,000923.4 at α=10°Mach=0 Ncrit=9Xfoil predictionDetails
   s809-nr100,000526.8 at α=9°Mach=0 Ncrit=5Xfoil predictionDetails
   s809-nr200,000951.7 at α=8.25°Mach=0 Ncrit=9Xfoil predictionDetails
   s809-nr200,000553.9 at α=7.25°Mach=0 Ncrit=5Xfoil predictionDetails
   s809-nr500,000981.2 at α=7°Mach=0 Ncrit=9Xfoil predictionDetails
   s809-nr500,000575.6 at α=6°Mach=0 Ncrit=5Xfoil predictionDetails
   s809-nr1,000,0009100.6 at α=6.25°Mach=0 Ncrit=9Xfoil predictionDetails
   s809-nr1,000,000589.8 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
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