associated directions of the resulting blade cast using the core similarly core portions may be identified with names corresponding to associated passageway portions formed when those core portions are removed from a casting additional passageway portions may be drilled or otherwise machined the feedcore 50 extends from an inboard end 60 to an outboard tip end 62 a base 64 is formed at the inboard end with a port plenum section 65 outboard thereof from upstream to downstream six trunks 66 67 68 69 70 and 71 extend tipward from the port plenum section 65 the feedcore 50 also has a leading end or edge 74 a trailing end or edge 75 a suction side 76 fig4 and a pressure side 77 fig4 the trunks extend within the root 42 of the resulting blade 20 and form associated passageway trunks the base 64 typically becomes embedded in a casting shell and falls outside the root 42 in the exemplary feedcore 50 the leading trunk 66 joins a first spanwise feed passageway portion leg 80 extending to a tip distal outboard end 82 the exemplary feed passageway portion 80 is connected to a leading edge impingement chamber cavity portion 84 the exemplary portion 84 is segmented the cavity cast by the portion 84 may be impingement fed by airflow from the feed passageway cast by the leg 80 the air passing through a series of apertures cast by connecting posts 86 the airflow may cool a leading edge portion of the airfoil via exiting the impingement cavity through drilled or cast outlet holes the second trunk 67 joins a spanwise feed passageway portion.