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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(gm15sm-il) GM15 (smoothed) | Gilbert Morris GM15 F1C class free flight flapper airfoil Max thickness 6.7% at 20.5% chord Max camber 4.8% at 49.3% chord | Remove Airfoil details Airfoil plotter |
(fx74cl5140-il) FX74_CL5_140 | Wortmann FX 74-CL5-140 high lift airfoil Max thickness 14% at 30.9% chord Max camber 9.9% at 37.1% chord | Remove Airfoil details Airfoil plotter |
(fxl142k-il) FX LIII-142 K 25 AIRFOIL | Wortmann FX LIII-142 K 25 airfoil Max thickness 14.2% at 30.9% chord Max camber 0% at 0% chord | Remove Airfoil details Airfoil plotter |
(glennmartin4-il) Glenn Martin 4 | Glenn Martin 4 airfoil Max thickness 15.5% at 30% chord Max camber 6% at 30% chord | Remove Airfoil details Airfoil plotter |
(fx78k140-il) FX 78-K-140/20 | Wortmann FX 78-K-140/20 airfoil for use with flaps (K) Max thickness 14.1% at 43.5% chord Max camber 4.4% at 43.5% chord | Remove Airfoil details Airfoil plotter |
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Polars for (gm15sm-il,fx74cl5140-il,fxl142k-il,glennmartin4-il,fx78k140-il)
| Plot | Airfoil | Reynolds # | Ncrit | Max Cl/Cd | Description | Source | |
|---|---|---|---|---|---|---|---|
| gm15sm-il | 50,000 | 9 | 45.2 at α=6.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| gm15sm-il | 50,000 | 5 | 46.1 at α=5.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| gm15sm-il | 100,000 | 9 | 66.2 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| gm15sm-il | 100,000 | 5 | 66.9 at α=4.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| gm15sm-il | 200,000 | 9 | 91.5 at α=3.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| gm15sm-il | 200,000 | 5 | 86.9 at α=4° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| gm15sm-il | 500,000 | 9 | 123.6 at α=3.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| gm15sm-il | 500,000 | 5 | 112.4 at α=3.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| gm15sm-il | 1,000,000 | 9 | 146.5 at α=3.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| gm15sm-il | 1,000,000 | 5 | 119.5 at α=4° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx74cl5140-il | 50,000 | 9 | 6.4 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx74cl5140-il | 50,000 | 5 | 18.3 at α=1° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx74cl5140-il | 100,000 | 9 | 33.1 at α=0.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx74cl5140-il | 100,000 | 5 | 46.8 at α=2.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx74cl5140-il | 200,000 | 9 | 72.7 at α=10° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx74cl5140-il | 200,000 | 5 | 73.8 at α=6° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx74cl5140-il | 500,000 | 9 | 118.8 at α=9° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx74cl5140-il | 500,000 | 5 | 115.5 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx74cl5140-il | 1,000,000 | 9 | 156.9 at α=8.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx74cl5140-il | 1,000,000 | 5 | 149.7 at α=6.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fxl142k-il | 50,000 | 9 | 27.1 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fxl142k-il | 50,000 | 5 | 28.3 at α=6.75° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fxl142k-il | 100,000 | 9 | 42.1 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fxl142k-il | 100,000 | 5 | 39.6 at α=6° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fxl142k-il | 200,000 | 9 | 54.8 at α=6° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fxl142k-il | 200,000 | 5 | 47.5 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fxl142k-il | 500,000 | 9 | 63.1 at α=7.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fxl142k-il | 500,000 | 5 | 60.6 at α=9° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fxl142k-il | 1,000,000 | 9 | 75.2 at α=8.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fxl142k-il | 1,000,000 | 5 | 72.1 at α=11.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| glennmartin4-il | 50,000 | 9 | 22 at α=3° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| glennmartin4-il | 50,000 | 5 | 27.8 at α=4.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| glennmartin4-il | 100,000 | 9 | 42.8 at α=4.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| glennmartin4-il | 100,000 | 5 | 40.9 at α=7° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| glennmartin4-il | 200,000 | 9 | 54.7 at α=8° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| glennmartin4-il | 200,000 | 5 | 49.7 at α=7.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| glennmartin4-il | 500,000 | 9 | 64.9 at α=7.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| glennmartin4-il | 500,000 | 5 | 62.8 at α=7.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| glennmartin4-il | 1,000,000 | 9 | 79.4 at α=7.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| glennmartin4-il | 1,000,000 | 5 | 77.5 at α=7.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx78k140-il | 50,000 | 9 | 16.3 at α=12.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx78k140-il | 50,000 | 5 | 15 at α=11.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx78k140-il | 100,000 | 9 | 26.2 at α=10° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx78k140-il | 100,000 | 5 | 27.2 at α=9.5° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx78k140-il | 200,000 | 9 | 54.2 at α=8.25° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx78k140-il | 200,000 | 5 | 53.8 at α=8° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx78k140-il | 500,000 | 9 | 125.1 at α=6.5° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx78k140-il | 500,000 | 5 | 122.5 at α=6° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
| fx78k140-il | 1,000,000 | 9 | 162.5 at α=5.75° | Mach=0 Ncrit=9 | Xfoil prediction | Details | |
| fx78k140-il | 1,000,000 | 5 | 153.1 at α=5.25° | Mach=0 Ncrit=5 | Xfoil prediction | Details | |
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