Polymer matrix laminate composites are lightweight ant strong, and probably with some metal cladding/sandwiching of Aluminium or Titanium alloys may be used for Airplane outer body, especially the upper side. Now, the immense-sized and curved upper surface of airplane seems not to be feasible to be made as a one-piece laminar composite, owing to this vast size. So, there are likely needs to attach the composite panels with one another to make the outer body of airplane. So, how these panels are joined? and how provisions to attach wings and propeller as well as metallic contacts are provided in the composite panels. That is, what are composite-to-composite and composite-to-metal joining techniques from outer body of airplane, especially the upper half?