| GAM-87A RAIN EROSION PROTECTION COATINGS FOR SUBSONIC SPEEDS (2005) | |||||||||
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| High velocity contact with raindrops causes a severe erosion problem on phenolic materials. The following test was run to determine the most suitable coating for protection of the thermal insulation material on the GAM-87A re-entry vehicle from rain erosion. Specimens made from Phenolic Refrasil and Phenolic Nylon, both coated and uncoated, weathered and unweathered, were tested at a velocity of 500 mph on two rotating, electrically driven propeller blades through a simulated rainstorm of 1 in./hr intensity and with drops of 2 mm average diameter. (Author) | |||||||||
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