Abstract:

The paper briefly presents the measurement techniques for micro-rolling-moment by means of micro-rolling-moment balances and free rolling method,with the emphasis on the gas bearing balance technique developed by High Speed Aerodynamics Institute of CARDC. The gas bearing balance technique has the advantages of economical and direct measurement and high accuracy. In measuring the micro-rolling-moment, the deviations of angle and coaxality, which have direct influences on the measurement accuracy, should be controlled according to the measurement accuracy of the rolling-moment.

Key words: hypersonic speed, wind tunnel, rolling moment, gas bearing balance