Method of making rotor blade root end attachment

Details Method of making rotor blade root end attachment Method of making rotor blade root end attachment

1978-10-05

1981-02-17

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156173, 156196, 156212, 156214, 156227, 156242, 416226, 416230, B29C 114

Patent

active

042513090

ABSTRACT:
A helicopter spar root end and blade assembly for attachment to the rotary ead of the helicopter, the spar includes the root end attachment having a series of formed apertures therein generally molded from strips of fiber reinforced tapes, and which tapes are turned from their disposition at the apertures for extension outboard of the blade to enhance its structural reinforcement against fatigue and fracture. The method for forming such a spar root end and blade assembly includes the disposition of a removable form for positioning of the resin treated tapes along the intended length of the spar root and blade, simultaneously positioning fiberglass sheets into the configuration of the intended blade assembly, and then compressing die halves into position around the tape and sheet formed assembly at a pressure and temperature for a stipulated period of time until the molded assembly and its inherent resin achieves curing and setting into its final and concise form.

REFERENCES:
patent: 3021246 (1962-02-01), Hutter et al.
patent: 3476484 (1969-11-01), Brunsch
patent: 3923422 (1975-12-01), Ianniello et al.
patent: 3943020 (1976-03-01), Ashton et al.
patent: 3950115 (1976-04-01), Euler
patent: 3967996 (1976-07-01), Kamov et al.
patent: 4096012 (1978-06-01), Belko et al.

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