Manual Wing-Fold Mechanism

A foldable aircraft wing, comprising: a first wing section having a first wing spar; a second wing section having a second wing spar wherein in a flight configuration the first wing spar is coupled to the second wing spar forming a wing spar juncture to transfer aerodynamic loads between the first wing section and the second wing section; an extension device, independent of the first wing spar and the second wing spar, pivotally coupling the first wing section to the second wing section, wherein responsive to decoupling the first wing spar from the second wing spar the extension device extends the first wing section apart from the second wing section along a lateral axis substantially parallel with the first wing spar, rotates the first wing section about the lateral axis, and pivots the first wing section at a pivot point associated with the second wing section, to a transportable configuration; and two or more shear pins, fixed to the first wing spar, coupling the first wing spar to the second wing spar wherein each of the two or more shear pins includes a first pin diameter and a second pin diameter and wherein a shear load is distributed among the first pin diameter and the second pin diameter.