Unlabeled

Cross-section of a light-aircraft wing, the NACA 2412 airfoil

NACA 2412 spells the shape: its centerline bows up 2% of the width, most at 40% from the nose, and it is 12% thick at most. The Cessna 172's wing is a modified 2412.

What does this axis measure?
What does this axis measure?
Cross-section of a light-aircraft wing, the NACA 2412 airfoil: 40 points, a line chart.
Reveal the axesHide the axes
y ↑
Height above the baseline (% of width)
x →
Distance from the nose (% of width)
Lines
Lower surface → Upper surface
Show the story, the data and the sourceHide the story, the data and the source
The data: 40 points
Distance from the nose (% of width)Height above the baseline (% of width), Upper surfaceHeight above the baseline (% of width), Lower surface
000
0.1620.889−0.557
0.6471.6−1.192
1.4532.316−1.774
2.5733.027−2.297
4.0013.724−2.758
5.7274.397−3.157
7.745.038−3.492
10.0275.635−3.763
12.5736.181−3.971
15.3626.664−4.117
18.3767.078−4.204
21.5957.415−4.237
24.9987.669−4.221
28.5637.837−4.162
32.2677.916−4.067
36.0867.904−3.945
39.9957.803−3.803
43.9697.625−3.64
47.9837.384−3.45
52.0097.088−3.239
56.0226.741−3.013
59.9966.351−2.779
63.9065.924−2.539
67.7255.468−2.299
71.4294.989−2.062
74.9944.496−1.831
78.3973.995−1.608
81.6153.496−1.394
84.6293.004−1.193
87.4182.529−1.005
89.9652.078−0.831
92.2521.657−0.674
94.2651.276−0.534
95.9910.94−0.412
97.4190.656−0.311
98.5390.429−0.231
99.3440.264−0.173
99.8290.163−0.137
99.9920.129−0.126
Source
Computed: the NACA four-digit airfoil equations of NACA Report 460 (Jacobs, Ward and Pinkerton, 1933) via David Lednicer's Incomplete Guide to Airfoil Usage, for the Cessna 172's airfoil
Licence
Original computation by Unlabeled; nothing copied from the source
Read
2026-10-25
Drawn
40 points as the puzzle showed them · line
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