Originally Posted by
Fark'n'ell
Could you elaborate please.
1. Largely isotropic materials like classic metallics (even forged parts) are inherently less weight efficient for a given design than composites that take advantage of the orthotropic structural aspect of fibers within a matrix on a blade.
2. Metal blades, for an equivalent fatigue life, will always outweigh a properly designed composite part (see #1)
3. Metal fatigue failure is usually sudden and typically less predictable than a properly designed composite equivalent.