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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(sd8020-il) SD8020-010-88 | Selig/Donovan SD8020 low Reynolds number airfoil Max thickness 10.1% at 27.5% chord Max camber 0% at 42.1% chord | Remove Airfoil details Airfoil plotter |
(e331-il) EPPLER 331 AIRFOIL | Eppler E331 flying wing airfoil Max thickness 11.2% at 28.3% chord Max camber 2.7% at 23.6% chord | Remove Airfoil details Airfoil plotter |
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Polars for (sd8020-il,e331-il)
| Plot | Airfoil | Reynolds # | Ncrit | Max Cl/Cd | Description | Source | |
|---|---|---|---|---|---|---|---|
| sd8020-il | 50,000 | 9 | 26.1 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sd8020-il | 50,000 | 5 | 26.6 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sd8020-il | 100,000 | 9 | 36.9 at α=4.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sd8020-il | 100,000 | 5 | 36.3 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sd8020-il | 200,000 | 9 | 47.5 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sd8020-il | 200,000 | 5 | 46.5 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sd8020-il | 500,000 | 9 | 63.1 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sd8020-il | 500,000 | 5 | 62 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| sd8020-il | 1,000,000 | 9 | 76.4 at α=6.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| sd8020-il | 1,000,000 | 5 | 73.7 at α=7.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e331-il | 50,000 | 9 | 17.4 at α=2.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e331-il | 50,000 | 5 | 27.1 at α=6.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e331-il | 100,000 | 9 | 40.3 at α=10.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e331-il | 100,000 | 5 | 46.3 at α=8.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e331-il | 200,000 | 9 | 63 at α=9.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e331-il | 200,000 | 5 | 64.9 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e331-il | 500,000 | 9 | 91.1 at α=8.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e331-il | 500,000 | 5 | 79.2 at α=8.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e331-il | 1,000,000 | 9 | 99.1 at α=8.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e331-il | 1,000,000 | 5 | 93.5 at α=8.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
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