Other polar curves can be measured after loading the glider with water ballast.
2.
The effect of airspeed on the rate of descent can be depicted by a polar curve.
3.
For example, a microphone's pickup pattern illustrates its proportional response to an incoming sound from a given direction, and these patterns can be represented as polar curves.
4.
In addition to TE compensation, the Netto variometer adjusts for the intrinsic sink rate of the glider at a given speed ( the polar curve ) adjusted for the wing loading due to water ballast.
5.
The loss of height can be measured at several speeds and plotted on a " polar curve " to calculate the best speed to fly in various conditions, such as when flying into wind or when in sinking air.
6.
Open VOGEL employs this kind of surfaces because they require less than a half of the number of panels required to generate a full 3D model, while they achieve very good results in the prediction of the main air-loads ( lift, induced drag and parasitic drag through an experimental polar curve ).
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