NACA 4418 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/naca-4418-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 17.98
- NACA 4418: 4 % camber at 40 % chord, 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  0.710  3.035  1.790  -2.543
2.5  1.777  4.339  3.223  -3.371
5  4.081  6.190  5.919  -4.315
7.5  6.490  7.578  8.510  -4.859
10  8.958  8.696  11.042  -5.196
15  14.006  10.393  15.994  -5.518
20  19.144  11.563  20.856  -5.563
25  24.334  12.324  25.666  -5.449
30  29.551  12.740  30.449  -5.240
40  40.000  12.700  40.000  -4.700
50  50.176  11.816  49.824  -4.038
60  60.303  10.369  59.697  -3.258
70  70.363  8.438  69.637  -2.438
80  80.342  6.064  79.658  -1.620
90  90.226  3.257  89.774  -0.813
95  95.128  1.687  94.872  -0.409
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-4418-airfoil/index.json
API: https://xemstudio.com/api/geometry?object=naca-4418-airfoil