Air control means

Details Air control means Air control means

F - Mech Eng,Light,Heat,Weapons

01

D

170/65

F01D 7/00 (2006.01) F01D 5/08 (2006.01)

Patent

CA 1233125

AIR CONTROL MEANS ABSTRACT OF THE DISCLOSURE 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 comprise 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.

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