METHOD OF MANUFACTURING A MULTIPOINT INJECTION SYSTEM

A multipoint injection system includes a manifold (102) with a plurality of flow passages (104, 106, 108, 110) defined through the manifold in the circumferential direction. The flow passages are spaced apart from one another in an axial direction. A plurality of feed arms (116) extends radially inward from the manifold. Feed arm portions (118, 120, 122, 124) of the flow passages extend through each of the feed arms to respective outlets. The feed arm portions of the flow passages are within the axial width of the manifold. A plurality of injection nozzles (126) are included, each in fluid communication with a respective one of the outlets. Each injection nozzle includes an air passage therethrough with an air inlet. The feed arms each follow a path that is circumferentially offset from the air inlets so each of the feed arms is clear from a flow path directly upstream in the axial direction of each of the air inlets.