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Your Reynold number range is 50,000 to 1,000,000. (set)

Airfoil Comparison

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Airfoil comparison (e431-il,e853-il,e682-il,goe498-il,raf38-il,raf34-il,goe504-il,goe290-il,goe735-il)
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    (e431-il) EPPLER 431 AIRFOIL

Eppler E431 sailplane airfoil
Max thickness 15.1% at 37.4% chord
Max camber 4.2% at 42.6% chord
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    (e853-il) EPPLER E853 AIRFOIL

Eppler E853 propeller airfoil
Max thickness 11.6% at 37.1% chord
Max camber 3.1% at 56.1% chord
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    (e682-il) EPPLER 682 AIRFOIL

Eppler E682 sailplane airfoil
Max thickness 15.3% at 40.4% chord
Max camber 2.9% at 40.4% chord
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    (goe498-il) GOE 498 AIRFOIL

Gottingen 498 airfoil
Max thickness 15.9% at 29.4% chord
Max camber 5.5% at 49.4% chord
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    (raf38-il) RAF 38 AIRFOIL

RAF-38 airfoil
Max thickness 12.7% at 30% chord
Max camber 2.5% at 40% chord
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    (raf34-il) RAF 34 AIRFOIL

RAF-34 airfoil
Max thickness 12.6% at 30% chord
Max camber 2% at 30% chord
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    (goe504-il) GOE 504 AIRFOIL

Gottingen 504 airfoil
Max thickness 18% at 29.2% chord
Max camber 5.4% at 39.2% chord
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    (goe290-il) GOE 290 (MVA 290) AIRFOIL

Gottingen 290 (MVA 290) airfoil
Max thickness 17.6% at 29.1% chord
Max camber 3.9% at 39.2% chord
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    (goe735-il) GOE 735 AIRFOIL

Gottingen 735 airfoil
Max thickness 20.1% at 30% chord
Max camber 4.4% at 30% chord
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Used for printing plan. A4 landscape approx 280mm
Used for printing plan. A4 landscape approx 180mm

Polars for (e431-il,e853-il,e682-il,goe498-il,raf38-il,raf34-il,goe504-il,goe290-il,goe735-il)

PlotAirfoilReynolds #NcritMax Cl/CdDescriptionSource 
   e431-il50,000922.1 at α=13.5°Mach=0 Ncrit=9Xfoil predictionDetails
   e431-il50,000519.8 at α=12°Mach=0 Ncrit=5Xfoil predictionDetails
   e431-il100,000948.3 at α=9.75°Mach=0 Ncrit=9Xfoil predictionDetails
   e431-il100,000546.2 at α=8°Mach=0 Ncrit=5Xfoil predictionDetails
   e431-il200,000979.8 at α=8°Mach=0 Ncrit=9Xfoil predictionDetails
   e431-il200,000576.8 at α=6.75°Mach=0 Ncrit=5Xfoil predictionDetails
   e431-il500,0009116 at α=6.25°Mach=0 Ncrit=9Xfoil predictionDetails
   e431-il500,0005109.2 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
   e431-il1,000,0009144.4 at α=5.5°Mach=0 Ncrit=9Xfoil predictionDetails
   e431-il1,000,0005130.2 at α=4°Mach=0 Ncrit=5Xfoil predictionDetails
   e853-il50,000935.6 at α=7.5°Mach=0 Ncrit=9Xfoil predictionDetails
   e853-il50,000535.9 at α=7.5°Mach=0 Ncrit=5Xfoil predictionDetails
   e853-il100,000960.6 at α=6.75°Mach=0 Ncrit=9Xfoil predictionDetails
   e853-il100,000559.7 at α=6°Mach=0 Ncrit=5Xfoil predictionDetails
   e853-il200,000985.9 at α=6°Mach=0 Ncrit=9Xfoil predictionDetails
   e853-il200,000582.5 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
   e853-il500,0009120.8 at α=4.75°Mach=0 Ncrit=9Xfoil predictionDetails
   e853-il500,0005103 at α=4°Mach=0 Ncrit=5Xfoil predictionDetails
   e853-il1,000,0009135.6 at α=4°Mach=0 Ncrit=9Xfoil predictionDetails
   e853-il1,000,0005114.4 at α=3.25°Mach=0 Ncrit=5Xfoil predictionDetails
   e682-il50,000925.1 at α=12°Mach=0 Ncrit=9Xfoil predictionDetails
   e682-il50,000521.5 at α=11.25°Mach=0 Ncrit=5Xfoil predictionDetails
   e682-il100,000943.2 at α=9.5°Mach=0 Ncrit=9Xfoil predictionDetails
   e682-il100,000537.8 at α=9°Mach=0 Ncrit=5Xfoil predictionDetails
   e682-il200,000975.4 at α=7.25°Mach=0 Ncrit=9Xfoil predictionDetails
   e682-il200,000558.1 at α=7.25°Mach=0 Ncrit=5Xfoil predictionDetails
   e682-il500,000991.2 at α=6.5°Mach=0 Ncrit=9Xfoil predictionDetails
   e682-il500,000587.7 at α=4.75°Mach=0 Ncrit=5Xfoil predictionDetails
   e682-il1,000,0009115.7 at α=5°Mach=0 Ncrit=9Xfoil predictionDetails
   e682-il1,000,0005105.7 at α=3.75°Mach=0 Ncrit=5Xfoil predictionDetails
   goe498-il50,00097.3 at α=7.75°Mach=0 Ncrit=9Xfoil predictionDetails
   goe498-il50,000524.7 at α=6°Mach=0 Ncrit=5Xfoil predictionDetails
   goe498-il100,000949.7 at α=8.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe498-il100,000553.5 at α=5.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe498-il200,000975.9 at α=5.75°Mach=0 Ncrit=9Xfoil predictionDetails
   goe498-il200,000573.5 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe498-il500,0009105.8 at α=4.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe498-il500,000591.5 at α=6.25°Mach=0 Ncrit=5Xfoil predictionDetails
   goe498-il1,000,0009123.8 at α=5.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe498-il1,000,0005102.3 at α=5.25°Mach=0 Ncrit=5Xfoil predictionDetails
   raf38-il50,000931.6 at α=8.75°Mach=0 Ncrit=9Xfoil predictionDetails
   raf38-il50,000532.5 at α=8°Mach=0 Ncrit=5Xfoil predictionDetails
   raf38-il100,000951.6 at α=7.5°Mach=0 Ncrit=9Xfoil predictionDetails
   raf38-il100,000551.9 at α=6.5°Mach=0 Ncrit=5Xfoil predictionDetails
   raf38-il200,000971.5 at α=6.25°Mach=0 Ncrit=9Xfoil predictionDetails
   raf38-il200,000569 at α=5.75°Mach=0 Ncrit=5Xfoil predictionDetails
   raf38-il500,000996.6 at α=5.25°Mach=0 Ncrit=9Xfoil predictionDetails
   raf38-il500,000590.5 at α=5.25°Mach=0 Ncrit=5Xfoil predictionDetails
   raf38-il1,000,0009114.7 at α=5°Mach=0 Ncrit=9Xfoil predictionDetails
   raf38-il1,000,000598.9 at α=4.75°Mach=0 Ncrit=5Xfoil predictionDetails
   raf34-il50,000925.7 at α=10.5°Mach=0 Ncrit=9Xfoil predictionDetails
   raf34-il50,000530.7 at α=7.75°Mach=0 Ncrit=5Xfoil predictionDetails
   raf34-il100,000948.2 at α=8.25°Mach=0 Ncrit=9Xfoil predictionDetails
   raf34-il100,000549.1 at α=7.25°Mach=0 Ncrit=5Xfoil predictionDetails
   raf34-il200,000967.5 at α=7°Mach=0 Ncrit=9Xfoil predictionDetails
   raf34-il200,000565.2 at α=6.25°Mach=0 Ncrit=5Xfoil predictionDetails
   raf34-il500,000990.8 at α=6°Mach=0 Ncrit=9Xfoil predictionDetails
   raf34-il500,000579.4 at α=6.25°Mach=0 Ncrit=5Xfoil predictionDetails
   raf34-il1,000,000999.8 at α=6.25°Mach=0 Ncrit=9Xfoil predictionDetails
   raf34-il1,000,000584.8 at α=5.25°Mach=0 Ncrit=5Xfoil predictionDetails
   goe504-il50,00093.7 at α=9.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe504-il50,000513.7 at α=2.75°Mach=0 Ncrit=5Xfoil predictionDetails
   goe504-il100,000934.2 at α=5.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe504-il100,000543.6 at α=5.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe504-il200,000966.2 at α=6°Mach=0 Ncrit=9Xfoil predictionDetails
   goe504-il200,000562.8 at α=4.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe504-il500,000991.7 at α=4°Mach=0 Ncrit=9Xfoil predictionDetails
   goe504-il500,000585.1 at α=4.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe504-il1,000,0009114.9 at α=4.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe504-il1,000,0005104.1 at α=4.75°Mach=0 Ncrit=5Xfoil predictionDetails
   goe290-il50,00096.6 at α=4.75°Mach=0 Ncrit=9Xfoil predictionDetails
   goe290-il50,000522.4 at α=5.25°Mach=0 Ncrit=5Xfoil predictionDetails
   goe290-il100,000941.7 at α=10.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe290-il100,000546.8 at α=8°Mach=0 Ncrit=5Xfoil predictionDetails
   goe290-il200,000969 at α=8°Mach=0 Ncrit=9Xfoil predictionDetails
   goe290-il200,000567 at α=6.75°Mach=0 Ncrit=5Xfoil predictionDetails
   goe290-il500,000996.5 at α=6.25°Mach=0 Ncrit=9Xfoil predictionDetails
   goe290-il500,000584 at α=4.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe290-il1,000,0009112.3 at α=4.75°Mach=0 Ncrit=9Xfoil predictionDetails
   goe290-il1,000,000592.4 at α=6.25°Mach=0 Ncrit=5Xfoil predictionDetails
   goe735-il50,00092.9 at α=13°Mach=0 Ncrit=9Xfoil predictionDetails
   goe735-il50,000516.4 at α=0.75°Mach=0 Ncrit=5Xfoil predictionDetails
   goe735-il100,000923.4 at α=1.75°Mach=0 Ncrit=9Xfoil predictionDetails
   goe735-il100,000535.9 at α=5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe735-il200,000949.6 at α=7°Mach=0 Ncrit=9Xfoil predictionDetails
   goe735-il200,000555.4 at α=6.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe735-il500,000982.2 at α=7.5°Mach=0 Ncrit=9Xfoil predictionDetails
   goe735-il500,000578.9 at α=8.5°Mach=0 Ncrit=5Xfoil predictionDetails
   goe735-il1,000,0009105 at α=9°Mach=0 Ncrit=9Xfoil predictionDetails
   goe735-il1,000,000597.3 at α=8.25°Mach=0 Ncrit=5Xfoil predictionDetails
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