MIL-STD-3033

Abstract

This standard describes a test method for testing the materials used as erosion protective systems of helicopter rotor blades for resistance to solid particle/sand erosion. These materials can be but are not limited to elastomers, other polymers (including reinforced plastics and composites), metals (including metal matrix composites), ceramics and coatings. <br><u>Purpose</u>. The purpose of this standard is to provide a standardized test method for particle/sand erosion resistance of materials used as erosion protective systems of helicopter rotor blades. The test measures the amount of material eroded from a stationary specimen by particles accelerated in a high-speed gas jet.<b><u>Intended Use:</u></b> This standard attempts to simulate the desert environment, specifically SW Asia, that rotor blades experience in flight, and to provide an evaluation of candidate materials that may perform better in that environment. The specific simulation requirements include approximate particle sizes from 240 to 550 microns (&#956;m), particle mass loads of 30 grams/cm², particle velocities of 730 ft. /sec., and impingement angles from 20 to 90o. Candidate materials include but not limited to elastomers, other polymers (including reinforced plastics and composites), metals (including metal matrix composites), ceramics and coatings. These design appliqu&#233;s and coatings should be in the form of insert, leading edges, paints, overlays, coatings, or other surfacing techniques that protects the base material from its environment. The following services and associated rotorcrafts will have immediate interest in this standard: the Air Force (MH-53, HH-60, UH-1, CV-22), the Army (CH-47, OH-58, UH-60, AH-64, UAV), the Navy (H-1, H-46, H-53, H-60, V-22), and the US Coast Guard (HH-3, HH-60, HH-65).<br>