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NREL's S827 Airfoil (s827-nr)

NREL's S827 Airfoil - NREL HAWT airfoil S827 primary 21.0% Dia=40 to 50 m Re=4.0E+6 Clmax(S)=1.00 Clmax(R)=0.99 Restrained max lift coef


Airfoil s827-nr
Details Dat file Parser  
(s827-nr) NREL's S827 Airfoil
NREL HAWT airfoil S827 primary 21.0% Dia=40 to 50 m Re=4.0E+6 Clmax(S)=1.00 Clmax(R)=0.99 Restrained max lift coef
Max thickness 21% at 44.9% chord.
Max camber 2.2% at 68% chord
Source NWTC National WInd Technology Center
Source dat file
The dat file is in Selig format
NREL's S827 Airfoil
   x/c        y/c
1.000000   0.000000
0.995865   0.000688
0.983991   0.003462
0.965623   0.008883
0.942076   0.016761
0.914301   0.026439
0.882774   0.037198
0.847739   0.048750
0.809883   0.060923
0.769919   0.073258
0.728467   0.085200
0.686063   0.096134
0.643172   0.105349
0.599873   0.111666
0.554955   0.115129
0.508787   0.116559
0.461905   0.116215
0.414850   0.114263
0.368130   0.110840
0.322276   0.106079
0.277778   0.100112
0.235151   0.093080
0.194854   0.085118
0.157351   0.076379
0.123048   0.067010
0.092339   0.057184
0.065565   0.047070
0.043030   0.036866
0.025012   0.026767
0.011673   0.017028
0.003275   0.008024
0.000399   0.002378
0.000036   0.000634
0.000013   0.000352
0.000003  -0.000165
0.000095  -0.000897
0.000363  -0.001597
0.000778  -0.002319
0.001965  -0.003820
0.003899  -0.005651
0.014437  -0.012259
0.030681  -0.019044
0.052502  -0.025920
0.079539  -0.032959
0.111405  -0.040201
0.147601  -0.047819
0.187347  -0.055799
0.229976  -0.064258
0.274275  -0.072950
0.319371  -0.081817
0.363258  -0.089640
0.405999  -0.094098
0.449111  -0.094786
0.492458  -0.091610
0.537389  -0.084728
0.583845  -0.075473
0.631390  -0.064654
0.679501  -0.053010
0.727544  -0.041261
0.774753  -0.030101
0.820228  -0.020155
0.862940  -0.011936
0.901760  -0.005792
0.935492  -0.001822
0.963007   0.000174
0.983348   0.000661
0.995812   0.000321
1.000000   0.000000
Dat file parser warnings
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Polars for NREL's S827 Airfoil (s827-nr)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   s827-nr50,000916.5 at α=12.25°Mach=0 Ncrit=9Xfoil predictionDetails
   s827-nr50,000514 at α=11.25°Mach=0 Ncrit=5Xfoil predictionDetails
   s827-nr100,000920.4 at α=10.75°Mach=0 Ncrit=9Xfoil predictionDetails
   s827-nr100,000521.3 at α=10°Mach=0 Ncrit=5Xfoil predictionDetails
   s827-nr200,000935.6 at α=9.25°Mach=0 Ncrit=9Xfoil predictionDetails
   s827-nr200,000535 at α=8.5°Mach=0 Ncrit=5Xfoil predictionDetails
   s827-nr500,000984.4 at α=6.5°Mach=0 Ncrit=9Xfoil predictionDetails
   s827-nr500,000581.3 at α=5.25°Mach=0 Ncrit=5Xfoil predictionDetails
   s827-nr1,000,0009121.4 at α=6°Mach=0 Ncrit=9Xfoil predictionDetails
   s827-nr1,000,0005109.6 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
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