Defines the beginning of the ribCell. The enumeration is within the ribSet.

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The orthotropyDirection is defined as rotation around the ribs z-axis. The rib coordinate system is defined as follows: x-axis is from leading to trailingeEdge of the componentSegment in the direction of the rib elongation. z-axis is normal to the rib in the direction of positive eta. y is defined by right hand rule. Rotation is around the z-axis. Zero degrees are at the x-axis positive direction.

WING: The Rotation along the x describes a rotation around a line, that is defined by the intersection of the rib with the wing middle plane (orientated from leading to trailing edge). This angle defaults to 90° which means, that the rib is perpendicular on the wings middle plane. PYLON: The Rotation along the z describes a rotation around the pylons z-axis (= rotation in top view). This angle defaults to 90° which means, that the rib is perpendicular to the pylons x-axis.

Defines the ending of the ribCell. The enumeration is within the ribSet.

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