Aeronautics and astronautics – Aircraft structure – Airfoil construction
Patent
1997-03-05
1999-03-16
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft structure
Airfoil construction
244133, 416224, B64C 336
Patent
active
058819720
ABSTRACT:
A sheath for covering and protecting a component leading edge of an airfoiled component is disclosed. The sheath includes a sheath leading edge, and a first protective side and a second protective side, wherein the first and second protective sides are merged at the sheath leading edge. A cavity is formed between the first and second protective sides, wherein the cavity is adapted to have the airfoiled component positioned therein and engage an inside surface of each of the first and second protective sides. The sheath is formed from a material including cobalt, and preferably a nickel-cobalt composition. Preferred embodiments include cobalt in the nickel-cobalt composition present between 8-32 wt. % and 30-54 wt. %, based on the weight of the sheath. An airfoiled component construction is also disclosed. This construction includes a main structural component formed in the shape of an airfoil, wherein the main structural component has a leading edge, and a sheath covering and protecting the leading edge, wherein the sheath is formed from a material including cobalt such as a nickel-cobalt composition. Preferred embodiments include cobalt in the nickel-cobalt composition present between 8-32 wt. % and 30-54 wt. %, based on the weight of the sheath.
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Graff John M.
Smith Blair A.
Barefoot Galen L.
United Technologies Corporation
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