Airfoil Comparison
Select airfoils from the airfoil database or add your own airfoils and compare the airfoil shape and lift/drag polars.
| Open full size plan in new window | Open paginated plan in new window | |
| Download PDF file | SVG image as text file | |
| Clear all | ||
(e71-il) E71 (5.15%) | Eppler E71 low Reynolds number airfoil Max thickness 5.2% at 25.7% chord Max camber 4.4% at 54% chord | Remove Airfoil details Airfoil plotter |
(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 | Remove Airfoil details Airfoil plotter |
(e678-il) EPPLER 678 AIRFOIL | Eppler E678 sailplane airfoil Max thickness 15.1% at 39.8% chord Max camber 5.1% at 53.7% chord | Remove Airfoil details Airfoil plotter |
(e694-il) EPPLER 694 AIRFOIL | Eppler E694 sailplane airfoil Max thickness 15.4% at 40.4% chord Max camber 4.9% at 59.2% chord | Remove Airfoil details Airfoil plotter |
(e817-il) EPPLER 817 HYDROFOIL AIRFOIL | Eppler E817 hydrofoil Max thickness 11% at 32.9% chord Max camber 2.9% at 66.7% chord | Remove Airfoil details Airfoil plotter |
(e837-il) EPPLER E837 HYDROFOIL AIRFOIL | Eppler E837 hydrofoil Max thickness 16.1% at 36.9% chord Max camber 0% at 0% chord | Remove Airfoil details Airfoil plotter |
Drawing Options
Polars for (e71-il,e682-il,e678-il,e694-il,e817-il,e837-il)
| Plot | Airfoil | Reynolds # | Ncrit | Max Cl/Cd | Description | Source | |
|---|---|---|---|---|---|---|---|
| e71-il | 50,000 | 9 | 48.5 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e71-il | 50,000 | 5 | 49.5 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e71-il | 100,000 | 9 | 75.1 at α=5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e71-il | 100,000 | 5 | 74 at α=4.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e71-il | 200,000 | 9 | 108.4 at α=3.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e71-il | 200,000 | 5 | 103.5 at α=3° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e71-il | 500,000 | 9 | 162.3 at α=2.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e71-il | 500,000 | 5 | 143.6 at α=1.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e71-il | 1,000,000 | 9 | 205 at α=1° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e71-il | 1,000,000 | 5 | 139 at α=1.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e682-il | 50,000 | 9 | 25.1 at α=12° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e682-il | 50,000 | 5 | 21.5 at α=11.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e682-il | 100,000 | 9 | 43.2 at α=9.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e682-il | 100,000 | 5 | 37.8 at α=9° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e682-il | 200,000 | 9 | 75.4 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e682-il | 200,000 | 5 | 58.1 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e682-il | 500,000 | 9 | 91.2 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e682-il | 500,000 | 5 | 87.7 at α=4.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e682-il | 1,000,000 | 9 | 115.7 at α=5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e682-il | 1,000,000 | 5 | 105.7 at α=3.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e678-il | 50,000 | 9 | 22.4 at α=13.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e678-il | 50,000 | 5 | 20 at α=12.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e678-il | 100,000 | 9 | 41.5 at α=11° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e678-il | 100,000 | 5 | 45.7 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e678-il | 200,000 | 9 | 79.3 at α=8° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e678-il | 200,000 | 5 | 78.1 at α=6.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e678-il | 500,000 | 9 | 116.8 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e678-il | 500,000 | 5 | 109.6 at α=5.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e678-il | 1,000,000 | 9 | 141.1 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e678-il | 1,000,000 | 5 | 130.7 at α=4.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e694-il | 50,000 | 9 | 25.3 at α=12.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e694-il | 50,000 | 5 | 21.4 at α=11.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e694-il | 100,000 | 9 | 40.4 at α=10.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e694-il | 100,000 | 5 | 36.4 at α=10° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e694-il | 200,000 | 9 | 61.7 at α=9° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e694-il | 200,000 | 5 | 59.4 at α=7.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e694-il | 500,000 | 9 | 113.1 at α=5.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e694-il | 500,000 | 5 | 111.8 at α=4.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e694-il | 1,000,000 | 9 | 155.5 at α=4.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e694-il | 1,000,000 | 5 | 147 at α=3.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e817-il | 50,000 | 9 | 26.9 at α=6.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e817-il | 50,000 | 5 | 29.8 at α=6° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e817-il | 100,000 | 9 | 40.9 at α=5.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e817-il | 100,000 | 5 | 47.3 at α=5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e817-il | 200,000 | 9 | 79.9 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e817-il | 200,000 | 5 | 71.3 at α=3.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e817-il | 500,000 | 9 | 113.7 at α=3.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e817-il | 500,000 | 5 | 98.2 at α=2.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e817-il | 1,000,000 | 9 | 138.1 at α=2.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e817-il | 1,000,000 | 5 | 112.4 at α=1.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e837-il | 50,000 | 9 | 26.6 at α=8.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e837-il | 50,000 | 5 | 25.5 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e837-il | 100,000 | 9 | 43.2 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e837-il | 100,000 | 5 | 37.7 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e837-il | 200,000 | 9 | 53 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e837-il | 200,000 | 5 | 50.3 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e837-il | 500,000 | 9 | 70.6 at α=6° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e837-il | 500,000 | 5 | 61.2 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| e837-il | 1,000,000 | 9 | 80.1 at α=5.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| e837-il | 1,000,000 | 5 | 65.7 at α=4.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| Reynolds number calculator | |||||||