NACA 23021 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/naca-23021-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 21.0
- NACA 23021: 5-digit 230 mean line (design lift coefficient 0.3, camber peak at 15 % chord), 21 % thick.
- NACA 5-digit 230xx: '2' × 3/2 = design lift coefficient 0.3; '30' = camber peak at 15 % chord on a simple mean line; last two digits = maximum thickness in % of chord (NACA Report 610; TM-4741).
- 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  0.398  3.560  2.102  -2.846
2.5  1.477  5.126  3.523  -3.794
5  3.996  7.294  6.004  -4.984
7.5  6.714  8.799  8.286  -5.816
10  9.495  9.880  10.505  -6.478
15  15.001  11.193  14.999  -7.515
20  20.221  11.805  19.779  -8.271
25  25.230  12.050  24.770  -8.737
30  30.232  12.045  29.768  -8.953
40  40.224  11.472  39.776  -8.822
50  50.204  10.353  49.796  -8.144
60  60.176  8.839  59.824  -7.072
70  70.140  7.020  69.860  -5.695
80  80.099  4.941  79.901  -4.057
90  90.053  2.609  89.947  -2.167
95  95.027  1.342  94.973  -1.121
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-23021-airfoil/index.json
API: https://xemstudio.com/api/geometry?object=naca-23021-airfoil