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E231 (e231-il)

E231 - Eppler E231 R/C sailplane airfoil


Airfoil e231-il
Details Dat file Parser  
(e231-il) E231
Eppler E231 R/C sailplane airfoil
Max thickness 12.3% at 39.4% chord.
Max camber 2.5% at 39.4% chord
Source UIUC Airfoil Coordinates Database
Source dat file
The dat file is in Selig format
E231
1	0
.9963	.00039
.98554	.00187
.96845	.00477
.94569	.00903
.91774	.0146
.88524	.02148
.84897	.02952
.80968	.03837
.7681	.04759
.72481	.05653
.68007	.06458
.63395	.07143
.58671	.07701
.53865	.08126
.49016	.08419
.44164	.08584
.39357	.08628
.34646	.08556
.30081	.08370
.2571	.08074
.21576	.07671
.17721	.07166
.14182	.06565
.10989	.05877
.08171	.05111
.05750	.04282
.03741	.03407
.02158	.02508
.01005	.01613
.00284	.00764
.00018	.00152
0	0
.00020	-.00139
.00093	-.00259
.00217	-.00382
.00325	-.00466
.01291	-.00966
.02804	-.01448
.04843	-.01890
.07381	-.02288
.10394	-.02638
.13848	-.02938
.17704	-.03189
.21921	-.03389
.26450	-.03541
.31240	-.03644
.36238	-.03700
.41385	-.03711
.46624	-.03677
.51892	-.03599
.5713	-.03477
.62279	-.03312
.67278	-.03104
.72067	-.02851
.76591	-.02537
.80826	-.02146
.84766	-.01692
.88392	-.01224
.91658	-.00796
.94488	-.00453
.96803	-.00209
.98539	-.00063
.99628	-.00007
1	0
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Lednicer format dat file
Selig format dat file

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Polars for E231 (e231-il)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   e231-il50,000932.6 at α=8.25°Mach=0 Ncrit=9Xfoil predictionDetails
   e231-il50,000530.5 at α=8°Mach=0 Ncrit=5Xfoil predictionDetails
   e231-il100,000953 at α=6.75°Mach=0 Ncrit=9Xfoil predictionDetails
   e231-il100,000551.1 at α=6°Mach=0 Ncrit=5Xfoil predictionDetails
   e231-il200,000977.9 at α=5.5°Mach=0 Ncrit=9Xfoil predictionDetails
   e231-il200,000568.5 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
   e231-il500,000993.4 at α=5°Mach=0 Ncrit=9Xfoil predictionDetails
   e231-il500,000576.1 at α=4°Mach=0 Ncrit=5Xfoil predictionDetails
   e231-il1,000,0009102.3 at α=4.25°Mach=0 Ncrit=9Xfoil predictionDetails
   e231-il1,000,000585.6 at α=3.75°Mach=0 Ncrit=5Xfoil predictionDetails
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