Airfoil insert with castellated end

An airfoil insert for discharging cooling air, comprising:

• a tubular body, said tubular body having an airfoil shaped transverse cross-section;
• a first end for introducing cooling air into said body;
• a second end, said second end being opposite said first end, the periphery of said second end comprises a concave shaped region, a convex shaped region located opposite the concave shaped region, a forward directed leading edge region located between said convex and concave shaped regions and a rearward directed trailing edge region located opposite said leading edge region;
• one or more tabs extending from said second end of said body, said tabs being spaced about a periphery of said second end, with a tab extending from said second end at each of said leading and trailing edge regions of the periphery;
• and one or more covers joined to said one or more tabs, said covers bridging said second end and defining one or more spaced apertures for discharging at least a portion of the introduced cooling air.

An airfoil insert for discharging cooling air, comprising:

• a tubular body, said body terminating at a first end for introducing cooling air and at a second end for discharging at least a portion of the cooling air;
• one or more tabs spaced about a periphery of said second end;
• and
• wherein a first tab bridges said second end and connects to a second tab by welding, defining one or more spaced apertures for discharging the at least a portion of the introduced cooling air.

An airfoil insert for discharging cooling air, comprising:

• a tubular body;
• a first end for introducing cooling air into said body;
• a second end, said second end being opposite said first end;
• one or more tabs extending from said second end of said body, said tabs being spaced about a periphery of said second end;
• and
• one or more covers joined to one or more separate tabs with at least one of said one or more covers being joined by brazing.

An airfoil insert for discharging cooling air, comprising:

• a tubular body, said body terminating at a first end for introducing cooling air and at a second end for discharging at least a portion of the cooling air;
• one or more tabs spaced about a periphery of said second end;
• and
• wherein a first tab bridges said second end and connects to a second tab by brazing, defining one or more spaced apertures for discharging the at least a portion of the introduced cooling air.