The single-seat DG 300-17, made of glass-reinforced plastic (GRP), may look like an ordinary glider, but it is in fact quite extraordinary. The performance of the DG 300 has been accurately measured and it is used as a reference to assess the performance of other gliders. In cooperation with the Technische Universität (TU) Braunschweig, it has been specially equipped with the instruments needed for this task. It thus acts as a measuring device for other gliders - in a way, it is the calibration standard for determining their speed polars. The speed polar shows the rate of descent of an aircraft versus its horizontal airspeed.
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