Abstract: An acceleration measuring system wherein acceleration transducers are mounted on a turntable supported by an air bearing and directly driven by a brushless motor. The output signals generated by the acceleration transducers are amplified by amplifiers mounted on the turntable and the output signals are converted to digital signals by an analog-to-digital converter also mounted on the turntable. The digital signals are modulated into AC signals by a modulator also mounted on the table and then transmitted to a demodulator on a fixed portion of the system through a rotary transformer. The output of the demodulator representing the acceleration signal is applied to digital-to-analog converters and also to a binary coded decimal converter. In an alternative embodiment, the acceleration transducers are mounted on individual separate turntables which in turn are mounted on a primary turntable.