Multi-walled airfoil core

An airfoil core, comprising:

• a first core portion having a hybrid skin core, a tip flag core, and a trailing edge core distributed in a chordwise direction between a leading edge of the airfoil core and a trailing edge of the airfoil core, wherein the trailing edge core is adjacent to a trailing edge of the airfoil core, the hybrid skin core and the trailing edge core extend in a spanwise direction, the tip flag core extends in the chordwise direction along a tip of the airfoil core from the hybrid skin core to the trailing edge of the airfoil core, the tip flag core extends in a thickness direction between a pressure side and a suction side of the airfoil core, and the hybrid skin core is arranged along the suction side of the airfoil core;
• and
• a second core portion having a serpentine core and a leading edge core distributed in the chordwise direction, wherein the leading edge core is adjacent to the leading edge of the airfoil core such that the leading edge core and the hybrid skin core are aligned in the chordwise direction, and the serpentine core is arranged along the pressure side of the airfoil core.