Airfoil Comparison
Select airfoils from the airfoil database or add your own airfoils and compare the airfoil shape and lift/drag polars.
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(s827-nr) NREL's S827 Airfoil | NREL HAWT airfoil S827 primary 21.0% Dia=40 to 50 m Re=4.0E+6 Clmax(S)=1.00 Clmax(R)=0.99 Restrained max lift coef Max thickness 21% at 44.9% chord Max camber 2.2% at 68% chord | Remove Airfoil details Airfoil plotter |
(goe399-il) GOE 399 AIRFOIL | Gottingen 399 airfoil Max thickness 6.9% at 29.9% chord Max camber 4.2% at 39.9% chord | Remove Airfoil details Airfoil plotter |
(goe429-il) GOE 429 AIRFOIL | Gottingen 429 airfoil Max thickness 11.4% at 30% chord Max camber 0.2% at 10% chord | Remove Airfoil details Airfoil plotter |
(goe766-il) GOE 766 AIRFOIL | Gottingen 766 airfoil Max thickness 12% at 25% chord Max camber 1.5% at 20% chord | Remove Airfoil details Airfoil plotter |
(s831-nr) NREL's S831 Airfoil | NREL HAWT airfoil S831 tip 18.0% Dia=40 to 50 m Re=3.5E+6 Clmax(S)=1.50 Clmax(R)=1.48 High max lift coef Max thickness 18% at 44.2% chord Max camber 5% at 53.1% chord | Remove Airfoil details Airfoil plotter |
(s4061-il) S4061-096-84 | Selig S4061 low Reynolds number airfoil Max thickness 9.6% at 30.9% chord Max camber 3.3% at 44.7% chord | Remove Airfoil details Airfoil plotter |
(s819-nr) NREL's S819 Airfoil | NREL HAWT airfoil S819 primary 21.0% Dia=10 to 20 m Re=1.0E+6 Clmax(S)=1.20 Clmax(R)=1.16 Restrained max lift coef Max thickness 21.1% at 28.4% chord Max camber 1.3% at 77.3% chord | Remove Airfoil details Airfoil plotter |
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Polars for (s827-nr,goe399-il,goe429-il,goe766-il,s831-nr,s4061-il,s819-nr)
| Plot | Airfoil | Reynolds # | Ncrit | Max Cl/Cd | Description | Source | |
|---|---|---|---|---|---|---|---|
| s827-nr | 50,000 | 9 | 16.5 at α=12.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s827-nr | 50,000 | 5 | 14 at α=11.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s827-nr | 100,000 | 9 | 20.4 at α=10.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s827-nr | 100,000 | 5 | 21.3 at α=10° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s827-nr | 200,000 | 9 | 35.6 at α=9.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s827-nr | 200,000 | 5 | 35 at α=8.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s827-nr | 500,000 | 9 | 84.4 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s827-nr | 500,000 | 5 | 81.3 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s827-nr | 1,000,000 | 9 | 121.4 at α=6° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s827-nr | 1,000,000 | 5 | 109.6 at α=5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe399-il | 50,000 | 9 | 40.8 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe399-il | 50,000 | 5 | 41.9 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe399-il | 100,000 | 9 | 59.4 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe399-il | 100,000 | 5 | 60.3 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe399-il | 200,000 | 9 | 79.3 at α=5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe399-il | 200,000 | 5 | 76.9 at α=5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe399-il | 500,000 | 9 | 104.6 at α=4.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe399-il | 500,000 | 5 | 98.4 at α=4.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe399-il | 1,000,000 | 9 | 124.1 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe399-il | 1,000,000 | 5 | 112.4 at α=3.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe429-il | 50,000 | 9 | 23.1 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe429-il | 50,000 | 5 | 26.9 at α=7° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe429-il | 100,000 | 9 | 35.5 at α=6.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe429-il | 100,000 | 5 | 37.6 at α=7° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe429-il | 200,000 | 9 | 47.4 at α=6.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe429-il | 200,000 | 5 | 45.3 at α=5.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe429-il | 500,000 | 9 | 57.2 at α=5.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe429-il | 500,000 | 5 | 58.6 at α=7.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe429-il | 1,000,000 | 9 | 67.9 at α=7° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe429-il | 1,000,000 | 5 | 72.7 at α=8.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe766-il | 50,000 | 9 | 19.2 at α=2.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe766-il | 50,000 | 5 | 27.4 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe766-il | 100,000 | 9 | 37.6 at α=8.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe766-il | 100,000 | 5 | 42 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe766-il | 200,000 | 9 | 55.9 at α=8.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe766-il | 200,000 | 5 | 57.2 at α=7.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe766-il | 500,000 | 9 | 80.3 at α=7.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe766-il | 500,000 | 5 | 77 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| goe766-il | 1,000,000 | 9 | 98 at α=6.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| goe766-il | 1,000,000 | 5 | 87.2 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s831-nr | 50,000 | 9 | 17.2 at α=13.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s831-nr | 50,000 | 5 | 14.2 at α=13.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s831-nr | 100,000 | 9 | 21.8 at α=13° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s831-nr | 100,000 | 5 | 21.2 at α=12.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s831-nr | 200,000 | 9 | 36.7 at α=11.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s831-nr | 200,000 | 5 | 47 at α=3.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s831-nr | 500,000 | 9 | 113.9 at α=7.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s831-nr | 500,000 | 5 | 112.6 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s831-nr | 1,000,000 | 9 | 152.7 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s831-nr | 1,000,000 | 5 | 147.5 at α=5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s4061-il | 50,000 | 9 | 35.7 at α=8.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s4061-il | 50,000 | 5 | 39.1 at α=7.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s4061-il | 100,000 | 9 | 59.7 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s4061-il | 100,000 | 5 | 60.7 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s4061-il | 200,000 | 9 | 84.3 at α=6.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s4061-il | 200,000 | 5 | 81.2 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s4061-il | 500,000 | 9 | 116.6 at α=5.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s4061-il | 500,000 | 5 | 105.7 at α=4.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s4061-il | 1,000,000 | 9 | 139.3 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s4061-il | 1,000,000 | 5 | 121.2 at α=3.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s819-nr | 50,000 | 9 | 7.9 at α=0.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s819-nr | 50,000 | 5 | 22.6 at α=9.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s819-nr | 100,000 | 9 | 38.4 at α=10.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s819-nr | 100,000 | 5 | 40.4 at α=8.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s819-nr | 200,000 | 9 | 55.6 at α=9.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s819-nr | 200,000 | 5 | 54.8 at α=8.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s819-nr | 500,000 | 9 | 77.6 at α=8.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s819-nr | 500,000 | 5 | 72.5 at α=7.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s819-nr | 1,000,000 | 9 | 93.4 at α=7.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s819-nr | 1,000,000 | 5 | 84.1 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
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