Before any preparatory wind tunnel work could begin, a means of rigidly connecting the bar to the wing mirror had to be developed. The strain gauge bar provided had three pre-existing holes cut through its top half and so this provided a starting place for a rigid connection. All that was needed was the fabrication of a bracket to utilise these holes and enable connection to the wing mirrors metal base.
A small triangular shaped rigid metal plate (T-Plate) was manufactured, which featured three countersunk holes that matched up with the strain gauge bar holes and two further holes situated in the corners for the attachment of the plate to the wing mirror base. A small washer plate was also produced to fit on the other side of the wing mirror fixings to ensure a completely rigid connection.
When tightly secured, this setup proved to be sufficiently rigid (Figure 6).
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