How Its Made- WING
A to scale Plan of the main wing section. It is pinned onto a perfectly flat drawing board.
The rib design is then traced onto a 1.5mm thick balsa sheet using a carboard template. The ribs are then cut out from the sheet using a paper knife(cutter)
The cut out rib sections are then pinned together for effective sanding.
Slots are cut out for both the top and bottom spars.
The lower spar and the lower portion of the trailing edge section is then pinned onto the plan. The ribs are then glued onto the appropriate places (as per the plan) and pinned. Next the top spar is placed in the slot and glued as shown.
A side view of the above
The top section of the trailing edge as well as the leading edge section are glued in place as shown. The same process is followed for the other wing section . Both sections are then pinned onto the board for few hours to remove warpage.
Next, the two wing sections are placed side by side pinned onto the board and glued together with balsa cement as shown.
The front section of the centre ribs is then cut out. This will be glued back after the dihedral braces are fixed.
For the dihedral, one section is raised as shown. It is rested onto a small balsa block(whose length is as per the dihedral angle chosen)
The dihedral braces are cut out using a template. The above photo shows a template being prepared.
The dihedral braces are then glued as shown using epoxy glue. The sections are clamped overnight.
The top sheeting and the centre sheeting (top & bottom) are then fixed. The wing is the sanded as shown.
Further sanding is done as shown, in order to get the perfect airfoil shape.
A voila! The wing is ready for covering.
This is what it all looks like finally!