Hollow fan blade for gas turbine engine

摘要

Hollow fan blades for turbo fan gas turbine engines are formed of two separate detail halves (30a,30b). Each detail half has a plurality of cavities (70) and ribs (72',73') machined out to reduce weight. These detail halves are subsequently bonded and given an airfoil shape in the forming operation. In one embodiment, contiguous cavities (70) are formed around freestanding ends of the ribs (72') to reduce the number of cavities required. The freestanding end (74') of each rib (72') is flared such that it has a larger width than the rest of the rib (72'). The cavity (70) extends continuously around the free, flared end (74') of the rib (72').