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SD7003 airfoil
What is the exact shape of the SD7003 airfoil? · Standard part · basis: Coordinates from the UIUC Airfoil Coordinates Database; thickness, camber and section by Xem Studio
Also called: sd7003, sd7003-085-88, SD7003 coordinates, SD7003 dat, SD7003 STEP, SD7003 STL, SD7003 profile
Exact dimensions. True size, with no printing tolerance added.
- length
- 100.0 mm
- width
- 20.0 mm
- height
- 8.51 mm
Notes
- SD7003: Michael Selig and John Donovan (SD series). Maximum thickness 8.51 % of chord at 24.4 % chord; maximum camber 1.46 % of chord at 33.4 % chord.
- Coordinates from the UIUC Airfoil Coordinates Database (M. Selig, UIUC Applied Aerodynamics Group), file sd7003.dat, titled 'SD7003-085-88'. Thickness and camber are computed by Xem Studio from those points (vertical distance at equal x, linear between points).
- The published trailing edge is sharp, so the section uses it as printed.
- The file is a 100 mm chord section, 20 mm deep: scale it uniformly to your chord, or import the STEP and sweep or loft it into a wing. Thickness scales with chord; the shape is the same at any size.
SD7003 airfoil size chart
| parameter | value | source |
|---|---|---|
| Max thickness | 8.51 % chord at 24.4 % chord | computed from the UIUC coordinates |
| Max camber | 1.46 % chord at 33.4 % chord | computed from the UIUC coordinates |
| Published points | 61 (32 upper, 30 lower, shared leading edge) | UIUC coordinates |
| Trailing edge as published | sharp (closed) | UIUC coordinates |
| y at x = 1.25 % chord | upper +1.590 / lower -1.195 % chord | linear between the published points (UIUC coordinates) |
| y at x = 2.5 % chord | upper +2.348 / lower -1.647 % chord | linear between the published points (UIUC coordinates) |
| y at x = 5 % chord | upper +3.378 / lower -2.170 % chord | linear between the published points (UIUC coordinates) |
| y at x = 7.5 % chord | upper +4.044 / lower -2.462 % chord | linear between the published points (UIUC coordinates) |
| y at x = 10 % chord | upper +4.537 / lower -2.654 % chord | linear between the published points (UIUC coordinates) |
| y at x = 15 % chord | upper +5.154 / lower -2.843 % chord | linear between the published points (UIUC coordinates) |
| y at x = 20 % chord | upper +5.504 / lower -2.896 % chord | linear between the published points (UIUC coordinates) |
| y at x = 25 % chord | upper +5.642 / lower -2.860 % chord | linear between the published points (UIUC coordinates) |
| y at x = 30 % chord | upper +5.637 / lower -2.762 % chord | linear between the published points (UIUC coordinates) |
| y at x = 40 % chord | upper +5.330 / lower -2.448 % chord | linear between the published points (UIUC coordinates) |
| y at x = 50 % chord | upper +4.742 / lower -2.032 % chord | linear between the published points (UIUC coordinates) |
| y at x = 60 % chord | upper +3.969 / lower -1.541 % chord | linear between the published points (UIUC coordinates) |
| y at x = 70 % chord | upper +3.071 / lower -0.993 % chord | linear between the published points (UIUC coordinates) |
| y at x = 80 % chord | upper +2.104 / lower -0.459 % chord | linear between the published points (UIUC coordinates) |
| y at x = 90 % chord | upper +1.098 / lower -0.053 % chord | linear between the published points (UIUC coordinates) |
| y at x = 95 % chord | upper +0.568 / lower +0.052 % chord | linear between the published points (UIUC coordinates) |
| Coordinates source | UIUC Airfoil Coordinates Database: sd7003.dat ('SD7003-085-88') | UIUC Applied Aerodynamics Group (M. Selig) |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| UIUC Applied Aerodynamics Group (M. Selig) | UIUC Airfoil Coordinates Database: sd7003.dat ('SD7003-085-88') | web | UIUC Airfoil Coordinates Database, public research data; coordinates are facts, cited and linked, not rehosted |
| UIUC Applied Aerodynamics Group (M. Selig) | UIUC Airfoil Coordinates Database (original: Michael Selig and John Donovan (SD series)) | web | UIUC Airfoil Coordinates Database, public research data; coordinates are facts, cited and linked, not rehosted |
Free files
★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json
| sd7003-airfoil-section-100mm-chord | SD7003 section, 100 mm chord × 20 mm span, 60 points from the published coordinates, single trailing-edge point (scale to your chord) | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=sd7003-airfoil
Fits with
Questions
How thick is the SD7003?
Maximum thickness 8.51 % of chord at 24.4 % chord: 8.51 mm on a 100 mm chord (computed from the UIUC coordinates).
How much camber does the SD7003 have?
Maximum camber 1.46 % of chord at 33.4 % chord (computed from the UIUC coordinates).
How do I use it for my wing?
Scale the 100 mm section to your chord (e.g. 180 mm chord = 180 % scale), then extrude or loft between root and tip sections. For a tapered wing, scale a root and a tip copy and loft between them.