Moldable fly-away tool structure system

A composite structure, comprising:

• a first face sheet;
• a second face sheet;
• a foam member located between the first face sheet and the second face sheet, the foam member having a molded contour, the molded contour being configured to provide a tooling surface for at least one of both the first face sheet and the second face sheet prior to curing of the composite structure, the foam member being rigid by having a foam body of uninterrupted foam, the molded contour of the foam member being an outer surface of the foam body;
• and
• a honeycomb core member located between the first face sheet and the second face sheet and the honeycomb member adjacently abutting the foam member, the honeycomb core member configured to provide structural stiffness in the composite structure;
• wherein a release member is used to prevent the foam member from being in bonding contact with the first face sheet and the second face sheet, so as to substantially prevent a shear load between first face sheet and second face sheet from being carried through the foam member.