Abstract
Measurements were made of the skin friction of various fabrics and surfaces due to interest in the reduction of the skin friction of Zeppelin outer cover. A machine was designed and constructed using Couette type of flow for the purpose of making the measurements. Results obtained with the machine are in general agreement with wind tunnel results. It was found that a smooth surface free from nap, whatever the material, approaches a limiting value for skin friction, and that as a surface becomes smoother any improvement in skin friction becomes increasingly hard to obtain. The results are illustrated by curves.
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