General Electric Company

Robert Andrew Peck

Ralph A Kirkpatrick

James W Tucker

Gerard P Kroger

A method for exhausting gas from an aircraft engine assembly is provided. The method includes coupling a first exhaust duct in fluid communication only to a first engine. The first exhaust duct includes a primary outlet and a secondary outlet. The method further includes coupling a second exhaust duct in fluid communication only to a second engine. The second exhaust duct includes a primary outlet and a secondary outlet. The method also includes aligning a portion of the first engine secondary outlet concentrically within a portion of the second engine secondary outlet.

Engine propulsion system and methods of assembling the same

An improved blade mounting arrangement for a gas turbine engine with a turbine and an annular flowpath therethrough is disclosed. The improvement comprises a one-piece outer casing and a one-piece inner casing bounding the flowpath. The outer casing has a plurality of circumferential recesses disposed therein with each of the recesses having first and second axially opposite circumferential slots. A plurality of first turbine blades, each with axially facing tangs on a mounting platform, mate with the slots in the outer casing recess. The inner casing has a plurality of recesses disposed therein, each of the recesses including a forward circumferential slot and concentric aft radially outer and radially inner circumferential slots. A plurality of second turbine blades, each with forward and aft axially facing tangs on a mounting platform, mate with respective ones of forward slot and radially outer slot in the inner casing recess.

Turbomachinery blade mounting arrangement

An improved blade retainer for locking radially projecting blades on a rotor includes an elastic spacer sized to be inserted into a radial space between the blade tang and the bottom of the rotor slot in a generally undeformed state without deformation of the tang or slot. The spacer is provided with a first arcuate surface which abuts the tang and a second arcuate surface which, in one embodiment, abuts the bottom of the rotor slot when the spacer is deformed, thereby exerting an outwardly directed load on the tang. The spacer is fixed against axial movement relative to the blades by means of a forward end lug which is in confronting and overlapping relationship with an end face on the blade tang when the spacer is deformed. Blocker means are insertable between the spacer and the bottom of the slot to retain the spacer in a deformed state and thereby bias the blade radially outwardly. A channelled sleeve can be provided under the spacer and blocker means to distribute the load over a greater area of the rotor slot to reduce wear thereof.

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Loveland, OH, United States of America

Robert Andrew Peck