Aircraft Heat Exchanger Finned Plate Manufacture

A heat exchanger plate for providing heat transfer between a first flow along a first flowpath and a second flow along a second flowpath, the heat exchanger plate comprising a substrate having:

• a first face and a second face opposite the first face;
• a leading edge along the second flowpath and a trailing edge along the second flowpath;
• a proximal edge having at least one inlet port along the first flowpath and at least one outlet port along the first flowpath;
• and
• at least one passageway along the first flowpath between the at least one inlet port of the plate and the at least one outlet port of the plate,
• the heat exchanger plate further comprising a plurality of fin structures along the first face, each fin structure comprising:
• a base secured to the first face;
• and
• a first fin and a second fin extending from respective first and second edges of the base to respective first and second free edges.