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Sigma KEE - AxisOfAnObject
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axis of an object
AxisOfAnObject is the Class of Predicates relating the Object and its axis which is a LineInSpace along it rotates. In (verticalAxis ?L ?O) ?L is the LineInSpace of Object ?O. For example, an Aircraft is free to rotate around three axes that are perpendicular to each other and intersect at its center of gravity.[Wikipedia]
Relationships      
Parents binary predicate A Predicate relating two items - its valence is two.
Instanceslongitudinal axislongitudinalAxis is an axis drawn through the body of the vehicle from tail to nose corresponding to the normal direction of flight, or the direction the pilot faces, similar to a ship's waterline.The rotation about this axis is called roll.[Wikipedia]
 transverse axistransverseAxis or lateral axis passes through an Aircraft from wingtip to wingtip. It is an axis running from the pilot's left to right in piloted aircraft,Rotation about this axis is called pitch.[Wikipedia]
 vertical axisverticalAxis has its origin at the center of gravity and is directed towards the bottom of the Aircraft, perpendicular to the wings and to the fuselage reference line. Motion about this axis is called yaw.[Wikipedia]


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