Recommended Paint System for Use on Ship Models.
DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT
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When conducting resistance experiments on ship models in towing tanks, changes in the surface roughness are known to cause changes in the model resistance. In the past several years problems with deteriorating paint surfaces on ship models have resulted in changes in the model resistance. An investigation was undertaken to evaluate existing paint systems available at DTNSRDC for use on towing tank ship models for their ability to maintain a hydraulically smooth surface while immersed in water for a time period of up to three weeks. Twenty-seven specimens of fiberglass and wood were coated with combinations of paints which were currently being used at DTNSRDC. The surface roughness of each specimen was measured and observations of the amount of slime were made before, during, and after the three week period. It was found that the Seaguard Epoxy Paint System and the Balto-glaze Epoxy Paint System did maintain a smooth surface for at least three weeks. Based on this investigation, the Seaguard Epoxy paint system is recommended for use on ship models because it was found to be relatively easier to apply and more economical than the Balto-glaze paint system. Author
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