Helicopter rotor blade having a replaceable anhedral tip

Details Helicopter rotor blade having a replaceable anhedral tip Helicopter rotor blade having a replaceable anhedral tip

B - Operations, Transporting

64

C

B64C 27/46 (2006.01)

Patent

CA 2145865

A replaceable tip portion (20) for a helicopter rotor blade (14) is selectively swept, tapered and anhedral. The tip portion is formed of an upper and lower composite tip skin layer (35), each tip skin layer having bonded thereto a honeycomb core (38). A channel (recess) (40) is formed in the honeycomb for receiving a rotor spar tip end (30), removably attached (60) to the rotor spar. The honeycomb core is attached to the upper and lower tip skin layers in halves, and is machined along the rotor blade chord plane (70) prior to assembly of the halves on the rotor spar. A composite tip cap (50) is fixed to the extreme tip end of the removable anhedral tip portion, the mating surface of the tip cap which is joined to the removable tip is machined to provide a precise joint.

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