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AH21 9% version (Andrew Hollom) (ah21-9-il)

AH21 9% version (Andrew Hollom) - Andrew Hollom AH 21 airfoil (original 9% version)


Airfoil ah21-9-il
Details Dat file Parser  
(ah21-9-il) AH21 9% version (Andrew Hollom)
Andrew Hollom AH 21 airfoil (original 9% version)
Max thickness 7% at 34.9% chord.
Max camber 1.8% at 54.8% chord
Source UIUC Airfoil Coordinates Database
Source dat file
The dat file is in Selig format
AH21 9% version (Andrew Hollom)
1.0000000  0.0000000
0.9967100  0.0007263
0.9872600  0.0027842
0.9723700  0.0059238
0.9524800  0.0098924
0.9276400  0.0144732
0.8981000  0.0194013
0.8642700  0.0244167
0.8266000  0.0293058
0.7855700  0.0339044
0.7416500  0.0380931
0.6953700  0.0417822
0.6472300  0.0449123
0.5977800  0.0474415
0.5475300  0.0493465
0.4970200  0.0506155
0.4467600  0.0512481
0.3972700  0.0512518
0.3490400  0.0506421
0.3024800  0.0494383
0.2580900  0.0476672
0.2162400  0.0453569
0.1773000  0.0425391
0.1416100  0.0392481
0.1094500  0.0355178
0.0810800  0.0313845
0.0567300  0.0268869
0.0365800  0.0220640
0.0207600  0.0169527
0.0093200  0.0115649
0.0023500  0.0059036
0.0000000  0.0000000
0.0033600 -0.0044914
0.0124700 -0.0081771
0.0267000 -0.0112875
0.0459600 -0.0139233
0.0701000 -0.0161019
0.0989600 -0.0178315
0.1322400 -0.0191149
0.1696300 -0.0199613
0.2107300 -0.0203837
0.2550900 -0.0204007
0.3022100 -0.0200365
0.3515600 -0.0193205
0.4025700 -0.0182875
0.4546300 -0.0169779
0.5071300 -0.0154364
0.5594400 -0.0137126
0.6112800 -0.0118476
0.6624400 -0.0098805
0.7123700 -0.0078675
0.7603700 -0.0058781
0.8057500 -0.0039899
0.8477900 -0.0022899
0.8858300 -0.0008691
0.9192500  0.0001818
0.9474800  0.0007871
0.9700300  0.0009163
0.9865300  0.0006426
0.9966000  0.0002120
1.0000000  0.0000000
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Lednicer format dat file
Selig format dat file

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Polars for AH21 9% version (Andrew Hollom) (ah21-9-il)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   ah21-9-il50,000934.2 at α=4.75°Mach=0 Ncrit=9Xfoil predictionDetails
   ah21-9-il50,000534.5 at α=4.5°Mach=0 Ncrit=5Xfoil predictionDetails
   ah21-9-il100,000951.1 at α=4.25°Mach=0 Ncrit=9Xfoil predictionDetails
   ah21-9-il100,000549 at α=3.5°Mach=0 Ncrit=5Xfoil predictionDetails
   ah21-9-il200,000973.5 at α=3.5°Mach=0 Ncrit=9Xfoil predictionDetails
   ah21-9-il200,000565 at α=2.5°Mach=0 Ncrit=5Xfoil predictionDetails
   ah21-9-il500,0009103.2 at α=2.25°Mach=0 Ncrit=9Xfoil predictionDetails
   ah21-9-il500,000578.4 at α=1.5°Mach=0 Ncrit=5Xfoil predictionDetails
   ah21-9-il1,000,0009113.5 at α=1.5°Mach=0 Ncrit=9Xfoil predictionDetails
   ah21-9-il1,000,000579.6 at α=5.75°Mach=0 Ncrit=5Xfoil predictionDetails
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