GAUGING APPARATUS FOR MEASURING ANGULAR EFFECT OF ONE COMPONENT PORTION RELATIVE TO ANOTHER PORTION HE COMPONENT

Apparatus for measuring the angular offset of one portion of a structure relative to another portion of the structure includes two displacement-sensitive transducers disposed so as to sense the positions of two points on the structure; a third displacement-sensitive transducer disposed so as to sense the position of another point on the structure; a first comparator for computing the difference between the outputs of the first two transducers; a second comparator for computing the difference between the outputs of the third transducer and the first comparator; and a calibrator for weighing the inputs of one of the comparator devices in accordance with trigonometric relation of the sensed points.