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AH 81-131 (ah81131-il)

AH 81-131 - Althaus AH 81-131 airfoil


Airfoil ah81131-il
Details Dat file Parser  
(ah81131-il) AH 81-131
Althaus AH 81-131 airfoil
Max thickness 13.1% at 40.2% chord.
Max camber 2.8% at 40.2% chord
Source UIUC Airfoil Coordinates Database
Source dat file
The dat file is in Selig format
AH 81-131
1.00000     0.00000
0.99893     -0.00014
0.99572     -0.00043
0.99039     -0.00070
0.98296     -0.00083
0.97347     -0.00073
0.96194     -0.00032
0.94844     0.00049
0.93301     0.00180
0.91573     0.00375
0.89668     0.00641
0.87592     0.00989
0.85355     0.01427
0.82967     0.01962
0.80438     0.02601
0.77779     0.03342
0.75000     0.04168
0.72114     0.05039
0.69134     0.05898
0.66072     0.06686
0.62941     0.07371
0.59755     0.07948
0.56526     0.08426
0.53270     0.08806
0.50000     0.09083
0.46730     0.09259
0.43474     0.09337
0.40245     0.09349
0.37059     0.09303
0.33928     0.09199
0.30866     0.09024
0.27886     0.08771
0.25000     0.08461
0.22221     0.08102
0.19562     0.07696
0.17033     0.07244
0.14645     0.06746
0.12408     0.06206
0.10332     0.05634
0.08427     0.05039
0.06699     0.04437
0.05156     0.03836
0.03806     0.03249
0.02653     0.02680
0.01704     0.02103
0.00961     0.01514
0.00428     0.00934
0.00107     0.00428
0.00000     0.00058
0.00107     -0.00222
0.00428     -0.00460
0.00961     -0.00698
0.01704     -0.00948
0.02653     -0.01186
0.03806     -0.01419
0.05156     -0.01649
0.06699     -0.01878
0.08427     -0.02106
0.10332     -0.02329
0.12408     -0.02537
0.14645     -0.02729
0.17033     -0.02913
0.19562     -0.03083
0.22221     -0.03239
0.25000     -0.03375
0.27886     -0.03484
0.30866     -0.03567
0.33928     -0.03634
0.37059     -0.03680
0.40245     -0.03703
0.43474     -0.03702
0.46730     -0.03671
0.50000     -0.03624
0.53270     -0.03555
0.56526     -0.03467
0.59755     -0.03362
0.62941     -0.03238
0.66072     -0.03103
0.69134     -0.02956
0.72114     -0.02801
0.75000     -0.02642
0.77779     -0.02477
0.80438     -0.02305
0.82967     -0.02124
0.85355     -0.01935
0.87592     -0.01738
0.89668     -0.01529
0.91573     -0.01312
0.93301     -0.01092
0.94844     -0.00878
0.96194     -0.00678
0.97347     -0.00498
0.98296     -0.00343
0.99039     -0.00215
0.99572     -0.00114
0.99893     -0.00043
1.00000     0.00000
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Polars for AH 81-131 (ah81131-il)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   ah81131-il50,000923.4 at α=9.75°Mach=0 Ncrit=9Xfoil predictionDetails
   ah81131-il50,000521.5 at α=9.5°Mach=0 Ncrit=5Xfoil predictionDetails
   ah81131-il100,000937.5 at α=8.75°Mach=0 Ncrit=9Xfoil predictionDetails
   ah81131-il100,000538.1 at α=7.75°Mach=0 Ncrit=5Xfoil predictionDetails
   ah81131-il200,000972.2 at α=7°Mach=0 Ncrit=9Xfoil predictionDetails
   ah81131-il200,000570.6 at α=6°Mach=0 Ncrit=5Xfoil predictionDetails
   ah81131-il500,0009110 at α=5.75°Mach=0 Ncrit=9Xfoil predictionDetails
   ah81131-il500,000595.8 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
   ah81131-il1,000,0009126.8 at α=5.25°Mach=0 Ncrit=9Xfoil predictionDetails
   ah81131-il1,000,0005104.8 at α=4.5°Mach=0 Ncrit=5Xfoil predictionDetails
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