Patent ID: 7941923

Claim:
A method of manufacturing a secondary fuel nozzle, comprising: providing a core portion having proximal and distal longitudinal ends, a central bore extending therethrough from said proximal end to said distal end for receiving a liquid fuel cartridge, and at least two passages concentric with said central bore and extending axially in parallel to said central bore along at least a part of the length thereof to said distal end; providing a unitary secondary fuel nozzle portion including a base flange, and a main shaft having a central bore for aligning with the central bore of the core and for receiving the liquid fuel cartridge; gun drilling a plurality of peripheral, axially extending bores so that each bore is disposed at a respective circumferentially spaced location about and extending in parallel to the central bore of the secondary fuel nozzle portion for flow communication at a proximal end thereof with at least one of said concentric passages of the core portion at the distal end of the core portion; and at least one of brazing and welding said core portion to said base flange of said unitary secondary fuel nozzle portion, whereby the core portion and nozzle portion are integrated to define a one-piece secondary fuel nozzle assembly.