A method is presented for determining the rate of roll of free-flight aerodynamic models by means of polarized radio waves. A discussion of the technique used and a description of the equipment are included. The discussion shows that through the use of this technique the direction of roll, as well as zero roll, is uniquely determined. Analysis of the data obtained and data accuracy are discussed and examples are given to show how the record-reduction method affects the accuracy of the data. In conclusion, a method for increasing the accuracy and reducing work-up effort is discussed.
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