The purpose of testing the wing mirror in the wind tunnel was to establish its drag characteristics at speeds ranging from 10 to 60mph, with the aim of using these results to validate values produced through the use of CFD.
In order to measure the drag force, the use of a small bar with strain gauges attached to either side was used, rather than employing the under floor balance method. A diagram of the apparatus is shown in Figure 5.
Figure 5 - Strain Gauge Bar
The bar was to be calibrated against load, the wing mirror was then rigidly attached and the apparatus placed in the wind tunnel for testing.
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