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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(s821-nr) NREL's S821 Airfoil | NREL HAWT airfoil S821 root 24.0% Dia=10 to 20 m Re=8.0E+5 Clmax(S)=1.40 Clmax(R)=1.35 Restrained max lift coef Max thickness 24.2% at 24.6% chord Max camber 2.6% at 77.6% chord | Remove Airfoil details Airfoil plotter |
(s822-nr) NREL's S822 Airfoil | NREL HAWT airfoil S822 tip 16.0% Dia=2 to 10 m Re=6.0E+5 Clmax(S)=1.00 Clmax(R)=0.98 Restrained max lift coef Max thickness 16% at 39.2% chord Max camber 1.8% at 59.5% chord | Remove Airfoil details Airfoil plotter |
(s823-nr) NREL's S823 Airfoil | NREL HAWT airfoil S823 root 21.0% Dia=2 to 10 m Re=4.0E+5 Clmax(S)=1.20 Clmax(R)=1.16 Restrained max lift coef Max thickness 21.2% at 24.3% chord Max camber 2.4% at 70.5% 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 |
(s9026-il) S9026 (9.5%) | Selig S9026 (9.5%) symmetrical horizontal stab airfoil used on the Opus R/C sailplane Max thickness 9.5% at 27.3% chord Max camber 0% at 0% chord | Remove Airfoil details Airfoil plotter |
(s9027-il) S9027 (8%) | Selig S9027 (8%) symmetrical vertical stab airfoil used on the Opus R/C sailplane Max thickness 8% at 22.9% chord Max camber 0% at 0% chord | Remove Airfoil details Airfoil plotter |
(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 |
(sc21006-il) NASA SC(2)-1006 AIRFOIL | NASA SC(2)-1006 airfoil Max thickness 6% at 30% chord Max camber 2.6% at 73% chord | Remove Airfoil details Airfoil plotter |
Drawing Options
Polars for (s821-nr,s822-nr,s823-nr,s831-nr,s9026-il,s9027-il,s827-nr,sc21006-il)
| Plot | Airfoil | Reynolds # | Ncrit | Max Cl/Cd | Description | Source | |
|---|---|---|---|---|---|---|---|
| s821-nr | 50,000 | 9 | 4.8 at α=11.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s821-nr | 50,000 | 5 | 19.4 at α=9.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s821-nr | 100,000 | 9 | 35.6 at α=9° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s821-nr | 100,000 | 5 | 37.4 at α=8.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s821-nr | 200,000 | 9 | 52.8 at α=8.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s821-nr | 200,000 | 5 | 51.1 at α=7.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s821-nr | 500,000 | 9 | 72.8 at α=7.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s821-nr | 500,000 | 5 | 66 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s821-nr | 1,000,000 | 9 | 87.5 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s821-nr | 1,000,000 | 5 | 75.6 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s822-nr | 50,000 | 9 | 27.7 at α=9.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s822-nr | 50,000 | 5 | 23.7 at α=9.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s822-nr | 100,000 | 9 | 42.7 at α=8.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s822-nr | 100,000 | 5 | 39.8 at α=7.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s822-nr | 200,000 | 9 | 68.6 at α=7° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s822-nr | 200,000 | 5 | 60.2 at α=6° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s822-nr | 500,000 | 9 | 94.7 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s822-nr | 500,000 | 5 | 85.1 at α=4.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s822-nr | 1,000,000 | 9 | 117.1 at α=4.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s822-nr | 1,000,000 | 5 | 96.9 at α=3.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s823-nr | 50,000 | 9 | 20.9 at α=11.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s823-nr | 50,000 | 5 | 20.4 at α=9° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s823-nr | 100,000 | 9 | 42.3 at α=9.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s823-nr | 100,000 | 5 | 43.2 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s823-nr | 200,000 | 9 | 62.5 at α=8° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s823-nr | 200,000 | 5 | 60 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s823-nr | 500,000 | 9 | 86.1 at α=7° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s823-nr | 500,000 | 5 | 77.5 at α=6° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s823-nr | 1,000,000 | 9 | 101.5 at α=6.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s823-nr | 1,000,000 | 5 | 87.6 at α=5.25° | 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 | |
| s9026-il | 50,000 | 9 | 24.2 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9026-il | 50,000 | 5 | 25.4 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9026-il | 100,000 | 9 | 33.8 at α=4.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9026-il | 100,000 | 5 | 34.6 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9026-il | 200,000 | 9 | 44.3 at α=4.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9026-il | 200,000 | 5 | 45.3 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9026-il | 500,000 | 9 | 60.9 at α=6° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9026-il | 500,000 | 5 | 61.5 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9026-il | 1,000,000 | 9 | 75.1 at α=6.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9026-il | 1,000,000 | 5 | 74.6 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9027-il | 50,000 | 9 | 22.6 at α=3.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9027-il | 50,000 | 5 | 23.9 at α=5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9027-il | 100,000 | 9 | 30.6 at α=3.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9027-il | 100,000 | 5 | 32.8 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9027-il | 200,000 | 9 | 40.7 at α=5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9027-il | 200,000 | 5 | 43.3 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9027-il | 500,000 | 9 | 57.9 at α=6° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9027-il | 500,000 | 5 | 59.5 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| s9027-il | 1,000,000 | 9 | 71.8 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| s9027-il | 1,000,000 | 5 | 73.1 at α=7.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| 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 | |
| sc21006-il | 50,000 | 9 | 28.3 at α=1° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sc21006-il | 50,000 | 5 | 29.8 at α=0.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sc21006-il | 100,000 | 9 | 39.2 at α=0.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sc21006-il | 100,000 | 5 | 48.9 at α=-0.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sc21006-il | 200,000 | 9 | 66.5 at α=-0.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sc21006-il | 200,000 | 5 | 61.3 at α=-1° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sc21006-il | 500,000 | 9 | 101.9 at α=-1.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sc21006-il | 500,000 | 5 | 92 at α=-2.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sc21006-il | 1,000,000 | 9 | 130.4 at α=-2° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sc21006-il | 1,000,000 | 5 | 100.2 at α=-3° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
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