A dynamometer table with a small inertia

Summary

The dynamometers type DOS-1, which have a small inertia, are subject to variations in their readings according to the conditions of their use.

The combination of the effects due to the displacement of the point of application of the resultant force within the lengths of the table, and the variation in the relations among the components of the force may lead to measurement errors up to 50% and more. In order to avoid considerable measurement errors it is necessary to keep, during measurements, the point of application of the resultant force within the limits of a portion of the table in its middle and amounting to 0.1–0.15 of its length.

If the above requirements are adhered to, the calibration of the dynamometer can be carried out by the simplest of means, namely by applying one force only in the longitudinal direction. The dynamometer errors in this case will amount to ±4% of the measured value.