Fluid reaction surfaces (i.e. – impellers) – Ambient fluid or exhaust gas directed through hub – fairing... – Aircraft spinner or cowling
Patent
1985-09-05
1988-03-22
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Ambient fluid or exhaust gas directed through hub, fairing...
Aircraft spinner or cowling
416239, B64C 1106, B64C 1114
Patent
active
047325380
ABSTRACT:
Air control means in a gas turbine engine having a variable pitch rotatable airfoil and means for varying the pitch of the airfoil are disclosed. The air control means comprises a platform fixedly attached to a radially inner end of the airfoil. The platform is generally positioned on a rotatable annular surface, which surface defines outer and inner spaces. In a first position, an edge portion of the platform substantially conforms to the annular surface. In a second position, the edge portion is displaced radially outwardly from the surface thereby allowing fluid communication between the outer and inner spaces.
REFERENCES:
patent: 1851513 (1932-03-01), Holmstrom
patent: 2622688 (1952-12-01), Lee
patent: 2670050 (1954-02-01), Enos
patent: 2681191 (1954-06-01), Elliott
patent: 2719592 (1955-11-01), Blanchard, Jr.
patent: 2745501 (1956-05-01), Blanchard et al.
patent: 3045762 (1962-07-01), Gaubis et al.
patent: 4019832 (1977-04-01), Salemme et al.
Sullivan Thomas J.
Tseng Wu-Yang
Wollenweber Gary C.
Foote Douglas S.
General Electric Company
Lawrence Derek P.
Powell Jr. Everette A.
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