SD7003 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/sd7003-airfoil/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Coordinates from the UIUC Airfoil Coordinates Database; thickness, camber and section by Xem Studio
Catalog version: 2026-10-20

Overall (mm): length 100.0, width 20.0, height 8.51
- 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.

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)

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- 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 — https://m-selig.ae.illinois.edu/ads/coord/sd7003.dat
- 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 — https://m-selig.ae.illinois.edu/ads/coord_database.html

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/sd7003-airfoil/index.json
API: https://xemstudio.com/api/geometry?object=sd7003-airfoil