They can compare their results to direct measurements from a balance (available separately). This gives them the downstream pressure distribution to find the drag on the aerofoil. Using a Pitot tube, students can traverse the aerofoil wake of the full-width aerofoil. Comparing the measured lift and drag of the two aerofoils shows the differences between two-dimensional and three-dimensional aerofoils. This model has the characteristics of a threedimensional aerofoil. The other aerofoil has a span that extends for half of the working section of the wind tunnel.
This model has the characteristics of a two-dimensional aerofoil. One aerofoil has a span that extends the full width of the working section of the Subsonic Wind Tunnel (AF100).
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