Final answer:
Polyurethane, epoxy, and acrylic coatings are commonly used as a coating system to protect exterior laminated plastic parts of high-speed aircraft, missiles, and helicopter rotary blades from rain erosion in flight.
Step-by-step explanation:
Coatings for Protecting Exterior Laminated Plastic Parts
For protecting exterior laminated plastic parts of high-speed aircraft, missiles, and helicopter rotary blades from rain erosion in flight, a coating system that is commonly used is polyurethane. Polyurethane coatings provide excellent resistance to erosion, abrasion, and weathering, making them suitable for this application.
Another coating type that can be used is epoxy. Epoxy coatings are known for their durability and chemical resistance, making them an effective choice for protecting against rain erosion.
Lastly, acrylic coatings may also be used. Acrylic coatings offer good weather resistance and UV protection, making them suitable for outdoor applications.