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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(usa31-il) USA 31 AIRFOIL | USA-31 airfoil Max thickness 14.8% at 19.7% chord Max camber 9.3% at 39.7% chord | Remove Airfoil details Airfoil plotter |
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Polars for (usa31-il)
| Plot | Airfoil | Reynolds # | Ncrit | Max Cl/Cd | Description | Source | |
|---|---|---|---|---|---|---|---|
| usa31-il | 50,000 | 9 | 4.9 at α=8.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| usa31-il | 50,000 | 5 | 14.1 at α=5.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| usa31-il | 100,000 | 9 | 34.9 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| usa31-il | 100,000 | 5 | 40.8 at α=7° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| usa31-il | 200,000 | 9 | 62.3 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| usa31-il | 200,000 | 5 | 54.8 at α=5.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| usa31-il | 500,000 | 9 | 76.8 at α=2.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| usa31-il | 500,000 | 5 | 69.2 at α=4° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| usa31-il | 1,000,000 | 9 | 88.2 at α=3.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| usa31-il | 1,000,000 | 5 | 79.9 at α=4.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
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