The subject of this experimental investigation is the phenomenon of self-excited vibrations occurring in externally pressurized, gas-lubricated bearings. The experimental program pursued here is guided by predictions based on prior analysis. An apparatus is designed and instrumented to provide for the variation of governing parameters and for the accurate determination of their critical values. Stability bounds are obtained for a circular thrust bearing and the experimental results are compared and contrasted with previously reported, theoretical stability limits.

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