1583. The Role of Load-Cell Rotation in Airplane Weight


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E J Gauthier: 1583. The Role of Load-Cell Rotation in Airplane Weight. 1984.



The actual weight and balance determination for an airplane is a task that involves hours of preparation followed by a fraction of an hour for the actual weighing. As in any other test, one objective is to derive the maximum amount of knowledge from the available test results. This paper presents a method of determining the acceptable accuracy limits for a weighing test and applying the acceptance criteria to determine whether the test results are acceptable or whether the test should be continued.
Acceptance testing includes a weighing process that involves physically moving the scales among the airplane jack points between the individual weighings. During an airplane weighing, the weight does not change and the center of gravity does not move. However, in multiple weighings the weight will apparently change and the center of gravity will apparently move. By analyzing the system, it is possible to correlate apparent center-of-gravity movement with weighing accuracy. This paper contains an example of the analysis technique used and several examples of apparent center-of-gravity movement, including an instance when the acceptance criteria was not met, the test was continued, and an acceptable result was later obtained.


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