The test setup consisted of the pushrod assemblies, mounted on a wing segment, which had been manufactured in the moulds of the F3B model «Wizard». This model is smaller than a current F3B model, but the wing section MH 42 can be considered as a representative section for these models. The tests were conducted in the Modellwindkanal of the Institute for Aero- and Gas Dynamics (formerly under the head of Prof. F.X. Wortmann), which is an excellent low Reynolds number wind tunnel. The combination of the wing chord of 0.2 m and the wind tunnel operating range lead to Reynolds numbers of 100'000 and 200'000 for these tests. Thus no high speed tests (speed task) were possible, but the results will be very similar at higher Reynolds numbers.
Side view of the three linkages on the lower surface of the wing. The wing chord was 200 mm and the size of the flap was 23% of the wing chord. Standard 2 mm diameter push rods of different lenghts were used.
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