초록 ▼

A helicopter tail rotor structure includes a thin, flat, tension-bearing strap of fibers extending spanwise, and is to be centrally secured by a hub to a helicopter tail mast. Flex sections are formed inboard of substantially equally divided portions of said fibers which extend as top and bottom bla

A helicopter tail rotor structure includes a thin, flat, tension-bearing strap of fibers extending spanwise, and is to be centrally secured by a hub to a helicopter tail mast. Flex sections are formed inboard of substantially equally divided portions of said fibers which extend as top and bottom blade spars from the outboard margins of the flex sections. Preferably, the planes of the flex sections and the planes of the spars are oriented at predetermined nose-up twist angles, one relative to the other.

대표청구항 ▼

A structural member for helicopter tail rotor, comprising: a unitary thin flat tension-bearing strap of integrated fibers extending span-wise substantially uniform in width and including a central section adapted for attachment to a hub on a helicopter tail mast with adjacent flex sections thinner t

A structural member for helicopter tail rotor, comprising: a unitary thin flat tension-bearing strap of integrated fibers extending span-wise substantially uniform in width and including a central section adapted for attachment to a hub on a helicopter tail mast with adjacent flex sections thinner than the central section and positioned between said central section and blade root locations, said straps being divided substantially equally outboard of said blade root locations to form upper and lower parallel spars, an upper and lower spar extending from the region of each of said blade root locations to blade tip locations to provide half-thick reinforcing spars parallel to each other and spaced apart along the upper and lower surfaces of the blade bodies for incorporation into and strengthening of the blade bodies.