Airfoil Data
SM701
SM701
Wing Geometry Simulator
The SM701 is a 11.1% chord-thickness airfoil with a maximum camber of 5.5% at 36% chord, suited to general-aviation and UAV wing design. At zero angle of attack the cambered geometry generates positive lift, giving an estimated zero-lift angle of -5.5°.
Thin airfoil theory predicts a stall angle near 11.6° and a peak lift-to-drag ratio around 66 at typical UAV and light-aircraft Reynolds numbers — useful benchmarks before running a full XFOIL or NeuralFoil polar. The 11% thickness provides structural depth for main-spar placement without excessive drag penalty at moderate speeds.
The SM701 appears in the wing design of at least 12 documented aircraft, including designs from Urban and Dova. Its proven track record across conventional and rotorcraft designs makes it one of the more field-validated profiles in the UIUC database.
Designers evaluating the SM701 typically compare it against profiles of similar thickness: NACA 63,3-418, EPPLER 664 AIRFOIL, EPPLER 664 (EXTENDED) AIRFOIL, FX 60-177 AIRFOIL, FX 83-W-160. The Dayton-Wright T-1 is another reference profile frequently considered alongside it.
Aircraft Using the SM701 Airfoil
Airo Aviation Airo 5 | Airo | Somers-Maughmer SM701 | Constant |
ATEC 321 Faeta | ATEC | Somers-Maughmer SM701 | Constant |
Dova DV-1 Skylark | Dova | Somers-Maughmer SM701 | Constant |
Dova DV-2 Infinity | Dova | Somers-Maughmer SM701 | Constant |
Fantasy Air Allegro 2000 | Fantasy | Somers-Maughmer SM701 | Constant |
ProFe Banjo | ProFe | Somers-Maughmer SM701 | Wortmann FX 60-126 |
ProFe DuoBanjo | ProFe | Somers-Maughmer SM701 | Wortmann FX 60-126 |
Roberts Cygnet | Roberts | Somers-Maughmer SM701 | Constant |
Urban Air UFM-10 Samba | Urban | Somers-Maughmer SM701 | Constant |
Urban Air UFM-10 Samba XXL | Urban | Somers-Maughmer SM701 | Constant |
Urban Air UFM-11 | Urban | Somers-Maughmer SM701 | Constant |
Urban Air UFM-13 Lambada | Urban | Somers-Maughmer SM701 | Constant |
Wing lofting: 2 of these aircraft taper from SM701 at the root to a different tip section. Use the Tapered filter to isolate them, then click any tip airfoil link to compare geometries.
Related Airfoils
Engineers evaluating the SM701 frequently compare it against profiles with comparable geometric constraints. Below are the closest matches based on maximum thickness (11.1%) and max camber (5.5%).