Method of forming a spar layup for an aerodynamic rotor blade

Details Method of forming a spar layup for an aerodynamic rotor blade Method of forming a spar layup for an aerodynamic rotor blade

1976-08-30

1978-06-20

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156227, 156459, 244123, 416226, 416230, B29C 1704

Patent

active

040960129

ABSTRACT:
A simplified layup mandrel with no contour or twist is utilized by the method of this invention for forming the spar member of an aerodynamic rotor blade. A fiber glass tape is wrapped (laid-up) to a desired thickness onto the simplified mandrel to form a strap as the initial step. Because of the simple design of the mandrel, the laid-up strap when removed from the mandrel has a basic U-shaped configuration with straight extending legs having substantially parallel vertically oriented faces. This strap is then placed on a forming mandrel and contoured to the desired shape either by hand or by coining in a forming die. The contoured strap is then utilized in any of the various subassemblies or final assembly of the composite aerodynamic rotor blade.

REFERENCES:
patent: 2589786 (1952-03-01), Engel et al.
patent: 3476484 (1969-11-01), Brunsch
patent: 3649425 (1972-03-01), Alexander
patent: 3713753 (1973-01-01), Brunsch
patent: 3923422 (1975-12-01), Ianniello et al.
patent: 3962506 (1976-06-01), Dunahoo

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