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Like their aircraft and engines, the Wrights' 1901 wind tunnel was developed in stages, through a series of variations and experiments. The challenge of creating reproductions of these pioneering instruments is that they exist only in descriptions - the Wrights did not preserve them.
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Bicycle experiment: The Wrights' cycles were their first airfoil testing platform.
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Tunnel development: The fate of the original tunnel is unknown. Fortunately, there was nothing really special about it. Surprisingly, this was part of its design.
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The fan: A lost component of the tunnel, this reproduction actually benefits from the Wrights' work.
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The airfoils: The critical models for the experiments.
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Lilienthal's experiments