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USNPS4 (smoothed) (usnps4-il)

USNPS4 (smoothed) - Jacobs USNPS4 (smoothed) 17.5 kW wind turbine airfoil


Airfoil usnps4-il
Details Dat file Parser  
(usnps4-il) USNPS4 (smoothed)
Jacobs USNPS4 (smoothed) 17.5 kW wind turbine airfoil
Max thickness 11.9% at 34.2% chord.
Max camber 5% at 34.2% chord
Source UIUC Airfoil Coordinates Database
Source dat file
The dat file is in Selig format
USNPS4 (smoothed)
1.000000       0.003907
0.997540       0.005014
0.990700       0.008068
0.980370       0.012414
0.966980       0.017639
0.950440       0.023567
0.930640       0.030051
0.907750       0.036881
0.882020       0.043880
0.853700       0.050907
0.823090       0.057840
0.790480       0.064595
0.756160       0.071104
0.720430       0.077285
0.683590       0.083074
0.645940       0.088414
0.607780       0.093242
0.569370       0.097513
0.530990       0.101190
0.492650       0.104261
0.454350       0.106704
0.416380       0.108480
0.378870       0.109559
0.342040       0.109899
0.306090       0.109455
0.271200       0.108174
0.237600       0.105991
0.205490       0.102829
0.175040       0.098605
0.146480       0.093236
0.119990       0.086635
0.095760       0.078740
0.073950       0.069526
0.054680       0.059112
0.038110       0.047936
0.024330       0.036543
0.013380       0.025420
0.005480       0.015034
0.000980       0.005837
0.000000       0.000174
0.000980      -0.004494
0.005480      -0.009308
0.013380      -0.012372
0.024330      -0.013940
0.038110      -0.014396
0.054680      -0.014139
0.073950      -0.013527
0.095760      -0.012851
0.119990      -0.012231
0.146480      -0.011689
0.175040      -0.011223
0.205490      -0.010819
0.237600      -0.010462
0.271200      -0.010135
0.306090      -0.009825
0.342040      -0.009519
0.378870      -0.009211
0.416380      -0.008896
0.454350      -0.008572
0.492650      -0.008238
0.530990      -0.007899
0.569370      -0.007554
0.607780      -0.007207
0.645940      -0.006862
0.683590      -0.006522
0.720430      -0.006191
0.756160      -0.005873
0.790480      -0.005571
0.823090      -0.005288
0.853700      -0.005028
0.882020      -0.004791
0.907750      -0.004581
0.930640      -0.004397
0.950440      -0.004241
0.966980      -0.004112
0.980370      -0.004007
0.990700      -0.003925
0.997540      -0.003869
1.000000      -0.003849
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Polars for USNPS4 (smoothed) (usnps4-il)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   usnps4-il50,000932.7 at α=5.75°Mach=0 Ncrit=9Xfoil predictionDetails
   usnps4-il50,000537.1 at α=6.25°Mach=0 Ncrit=5Xfoil predictionDetails
   usnps4-il100,000955.5 at α=4°Mach=0 Ncrit=9Xfoil predictionDetails
   usnps4-il100,000553.2 at α=4.5°Mach=0 Ncrit=5Xfoil predictionDetails
   usnps4-il200,000974.3 at α=2.5°Mach=0 Ncrit=9Xfoil predictionDetails
   usnps4-il200,000567.2 at α=3.75°Mach=0 Ncrit=5Xfoil predictionDetails
   usnps4-il500,000995.2 at α=1°Mach=0 Ncrit=9Xfoil predictionDetails
   usnps4-il500,000587.2 at α=5.5°Mach=0 Ncrit=5Xfoil predictionDetails
   usnps4-il1,000,0009110.8 at α=4.5°Mach=0 Ncrit=9Xfoil predictionDetails
   usnps4-il1,000,0005105.3 at α=6°Mach=0 Ncrit=5Xfoil predictionDetails
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