Frangible airfoil structure

Details Frangible airfoil structure Frangible airfoil structure

1975-10-02

1977-05-10

Raduazo, Henry F.

Rotary kinetic fluid motors or pumps

Including destructible, fusible, or deformable non-reusable...

415160, 55306, F01B 2516

Patent

active

040225402

ABSTRACT:
An inlet guide vane for a turbofan engine comprises a principal airfoil portion fabricated of metal and a radially outward and rearward corner portion fabricated of a frangible material which is attached to the metal portion and completes the airfoil structure. When foreign objects are ingested into the airstream to cause the closely spaced fan blades to deform forwardly to impact against the inlet guide vane, the frangible rearward corner of the inlet guide vane is caused to break off into small pieces and pass through the system without causing any significant secondary damage, thereby leaving the principal portion of the inlet guide vane to function as a relatively efficient airfoil.

REFERENCES:
patent: 1142916 (1915-06-01), Scott
patent: 1364197 (1921-01-01), Heath
patent: 2362804 (1944-11-01), Cox, Jr.
patent: 3113430 (1963-12-01), Beale et al.
patent: 3215511 (1965-11-01), Chisholm et al.
patent: 3294366 (1966-12-01), Coplin
patent: 3403893 (1968-10-01), Stoffer
patent: 3628890 (1971-12-01), Sayre
patent: 3758234 (1973-09-01), Goodwin
patent: 3856434 (1974-12-01), Hoffmann

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