Disclosed is a field repairable coated airfoil such as a wing or a rotor blade having a leading edge protected by a spray applied or prefabricated variable thickness, multilayer coating system composed a primer or adhesive layer, a basecoat layer and a topcoat where the coating is continuously tapering having a thicker cross section at the leading edge and a thinner cross section at the trailing edge of the airfoil.
B64F 5/00 - Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided forHandling, transporting, testing or inspecting aircraft components, not otherwise provided for
This invention relates to the repair and removal of erosion or impact damage with a liquid repair material using a flexible applicator capable of conforming to the surface of the leading edge of the airfoil while being drawn lengthwise along the airfoil surface of a helicopter or wind turbine rotor blade thereby restoring the aerodynamic contour with or without the addition of an optional topcoat layer.
B05D 1/42 - Distributing applied liquids or other fluent materials by members moving relatively to surface by non-rotary members
B05D 5/00 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
B05D 5/06 - Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
B05D 7/00 - Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
Abrasion-resistant coating compositions for polymeric and other substrates for use on helicopter rotor blades, aircraft propeller blades, radomes, antennas, nose cones, propeller blades on boats and ships, turbine blades in hydro-power generation plants, personal watercraft, lift fan blades and propulsion blades for air cushioned vehicles, wind mill blades, earth moving equipment fan blades and marine power connectors
Abrasion-resistant coating compositions for polymeric and other substrates for use on helicopter rotor blades, aircraft propeller blades, radomes, antennas, nose cones, propeller blades on boats and ships, turbine blades in hydro-power generation plants, personal watercraft, lift fan blades and propulsion blades for air cushioned vehicles, wind mill blades, earth moving equipment fan blades and marine power connectors
5.
METHOD AND COATING FOR PROTECTING AND REPAIRING AN AIRFOIL SURFACE USING MOLDED BOOTS, SHEET OR TAPE
Disclosed is a field repairable airfoil structure such as a wing or a rotor blade and a method for repair and removal of erosion or impact damage to elastomeric coatings on surfaces such as the leading edge of the airfoil using special hand sandable coatings and preformed molded boots, preformed sheets or tapes with an optional topcoat applied thereto having higher sand erosion resistance.
This invention relates to the repair and removal of erosion or impact damage using hand sandable elastomeric coatings on a curved substrate, particularly such surfaces as the leading edge of the airfoil. Specialized applicators and methods of use are also disclosed.
A method of protecting a substrate against damage comprising disposing on a substrate one or more coatings, wherein one coating comprises an isocyanate-terminated polyurethane prepolymer and a curing agent; wherein the curing agents comprise polyaspartic esters, ketimines, aldimines, or a combination comprising at least one of the foregoing curing agents; reacting the isocyanate-terminated polyurethane prepolymer with a curing agent; wherein the reacting can optionally be carried out in the presence of moisture or heat; and curing the isocyanate-terminated polyurethane prepolymer to form the coating.
