Abstract

The drag characteristics of seven different cable designs were measured using the force balance in the John J. Harper Wind Tunnel at Georgia Tech. Each cable was mounted across the tunnel test section, so that the air flow was perpendicular to the cable axis. Cable vibration was negligible. The drag of a smooth one-inch pipe was also measured, and compared with theoretical predictions based on Stokes flow over an infinite circular cylinder. The tunnel speed was varied from 15fps to 146.7fps. The pipe drag data confirmed the accuracy of the measurements, since they matched theoretical predictions well. For each cable, measurements were made twice at each speed. This confirmed that the measurements were repeatable with good precision. The Oval cables were found to have the lowest drag coefficients.

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