20. ABSTRACT-?on the main rotor blades, comparison between the G697 and the E2460-40-1 showed that the E24604 substance was significantly more effective and shows promise as an ice phobic coting. The E2460-40-I aided ice shedding at-5"C and 0.5 gram per cubic meter (m/m 3) liquid water content (LWC) and-10C and 0.25 gm/m 3 LWC without ieaching the incremental engine torque or airframe vibration test limit. It did not provide adequate protection at-15°C. Further development should be conducted to improve the ice shedding capabilities of the E2460-40-1 substance over a wider range of icing conditions.
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