Polyimide Engine Ducts-Basic research and fabrication studies have been conducted in the use of high temperature resin systems. One such system, PMR-15, was used to fabricate several large structures, such as the thrust reverser inner barrel shown at right. A core cowl made from PMR-15 flew on a commercial airliner as part of an evaluation test program. Recent research has focused on developing a toughened polyimide matrix that exhibits superior durability.

Leading Edge Erosion-One of the product durability issues being worked in R&D is damage protection for leading edges of composite laminates. One method being investigated is the spray application of a ceramic coating, as shown to the right applied to the leading edge of a fan cowl door. The coating helps prevent delamination caused through wind erosion and edge impacts.

Improved Fire Barriers-In an effort to reduce manufacturing costs and save weight, advanced fire protective materials and coatings are being tested to meet FAA safety certification. These new materials will be applied to future nacelle and APU installations offering customers improved performance at a lower price.