Blade with shielding for enhanced protection against lightning,

Details Blade with shielding for enhanced protection against lightning, Blade with shielding for enhanced protection against lightning,

1996-11-25

1998-09-01

Kwon, John T.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Having wear liner, sheathing or insert

F04D 2938

Patent

active

058001298

ABSTRACT:
An apparatus for shielding a blade against lightning includes a conducting leading edge glove and a conducting cap, distinct from the glove, and overlapping the blade tip across its entire chord. At least the cap has a suction face arm and a pressure face arm of different dimensions at least in the direction of its span. Mechanical devices, such as screws and rivets with protruding shapes, in addition to some glueing, fix the cap on the composite structure of the blade, and are earthed by the cap, forming points where lightning can enter or exit, protecting the surrounding composite structure of the blade against damage. When the blade is mounted on a member for linking to the hub, electrical continuity with this member and the hub is provided.

REFERENCES:
patent: 1842178 (1932-01-01), Kempton
patent: 3923421 (1975-12-01), Carter
patent: 4784575 (1988-11-01), Nelson et al.
patent: 4944655 (1990-07-01), Merz
patent: 5306120 (1994-04-01), Hammer et al.
patent: 5354176 (1994-10-01), Schilling et al.
patent: 5542820 (1996-08-01), Eaton et al.

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