NACA 0018 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/naca-0018-airfoil/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Computed from the NACA equations (Report 460 / Report 610, restated in NASA TM-4741)
Catalog version: 2026-10-20

Overall (mm): length 100.0, width 20.0, height 18.0
- NACA 0018: symmetric, 18 % thick.
- NACA 4-digit: first digit = maximum camber in % of chord, second = its position in tenths of chord, last two = maximum thickness in % of chord (NACA Report 460).
- Ordinates are in % of chord from the leading edge, computed from the published equations with the closed-trailing-edge thickness coefficient (−0.1036, as in NASA TM-4741). The original reports use an open trailing edge (−0.1015); the difference is under 0.03 % of chord near the trailing edge.
- 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.

x (% chord)  upper x  upper y  lower x  lower y
0  0.000  0.000  0.000  0.000
1.25  1.250  2.841  1.250  -2.841
2.5  2.500  3.922  2.500  -3.922
5  5.000  5.332  5.000  -5.332
7.5  7.500  6.300  7.500  -6.300
10  10.000  7.024  10.000  -7.024
15  15.000  8.018  15.000  -8.018
20  20.000  8.606  20.000  -8.606
25  25.000  8.911  25.000  -8.911
30  30.000  9.001  30.000  -9.001
40  40.000  8.700  40.000  -8.700
50  50.000  7.929  50.000  -7.929
60  60.000  6.821  60.000  -6.821
70  70.000  5.450  70.000  -5.450
80  80.000  3.857  80.000  -3.857
90  90.000  2.048  90.000  -2.048
95  95.000  1.056  95.000  -1.056
100  100.000  -0.000  100.000  0.000

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- NACA (NASA Technical Reports Server): Report 460: The characteristics of 78 related airfoil sections from tests in the variable-density wind tunnel (Jacobs, Ward, Pinkerton, 1933) — web — Publisher's page; dimensions are facts — https://ntrs.nasa.gov/citations/19930091108
- NASA: TM-4741: Computer program to obtain ordinates for NACA airfoils (Ladson, Brooks, Hill, Sproles, 1996) — web — Publisher's page; dimensions are facts — https://www.pdas.com/refs/tm4741.pdf

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/naca-0018-airfoil/index.json
API: https://xemstudio.com/api/geometry?object=naca-0018-airfoil