Along the trailing edge, measure 1 inch above the center crease and make a mark. Once this is done, measure 1 inch from the wingtip along the trailing edge and make a mark. (Photographs 1 to 2)

From the first mark, measure 1 inch onward and make a mark. Then from this new mark, measure a further 0.75 inches further from the center crease and make a mark. (Photograph 3)

From the last two marks you made, measure perpendicularly 0.375 inches inward on each and make lines of that distance. (Photographs 4 to 5) Cut along each of these lines. (Photographs 6 to 7)

Fold the wings down at the first mark while keeping the trailing edges of the wing aligned with that of the fuselage. Repeat on the other side. (Photographs 8 to 9) Be sure the nacelles are not in the way of the wing folding during this process.



Once the wings have been folded, fold the winglets. (You need to make a mark 1 inch in from the wingtip on the wing you did not mark before.)