Originally Posted by
rpenmanparker
Actually lower modulus is not higher elasticity, but rather more flexible, or put another way, easier to bend. But I get your point.
Elasticity: The ability of a deformed material body to return to it's original shape and size when the forces causing deformation are removed.
In common terms: Elasticity is flexibility, and the more elastic it is, the more it can bend. (Yield strength is the total amount of force it can take before it bends beyond springing back.)
So they use higher elasticity carbon (low-mod) where they want it to bend.