Originally Posted by
mayam13
Thank you. Titanium is costly hence designers are reluctant to use it. However to arrest flying debris from high speed compressor and turbine discs composites is a poor choice, the incident proves it.
Nonsense, on three counts.
1. While pricey, titanium has many unique properties. If those properties are desirable or necessary in a design, aircraft designers will not hesitate to use titanium.
2. Nacelle cowlings are NOT intended nor designed to "arrest flying debris from high speed compressor and turbine discs." The engine's fan and turbine case are so intended and so designed.
3. Composite fibers are an ideal ballistic material. Consider that ALL bullet proof vests are made of composite fibers, and essentially ALL armored vehicles have spall liners made of composite fibers.