INVESTIGATION OF ICE ACCRETION CHARACTERISTICS OF HYDROPHOBIA MATERIALS.
Final rept. Jun 68-Jun 69,
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J
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To determine their effectiveness as anti-icing agents, 23 hydrophobic materials were evaluated in a dynamic icing environment. Each substance was examined in a manner that would determine its ice accretion characteristics and ice release properties. No attempt was made to stimulate ice release by either thermal or mechanical means during individual test runs. Ice formed on all the materials which were investigated at the same rate as on the untreated aluminum wing section which was utilized as a test bed. There was no observed release of ice due to aerodynamic forces associated with the test velocities 110 to 150 knots. The minimum ice adhesion force of any product evaluated was 1.8 pounds per square inch, with maximum values in excess of 40 pounds per square inch. Author
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