Wing Assembly - Mitsubishi Ki-15 Babs Construction Manual

The wing is three-piece for ease of assembly and transportation. With the center section in place
and the stab removed, the airplane fits into a compact hatchback car. Removing the outer panels
also allows access to set screws that hold the landing gear in place. Wing bolts are hidden under
the single flap which, when lowered, allows access to the wing bolts.
The novel Spangenberg aileron linkage shown is also completely hidden in the wing. It
is very low-play, high mechanical advantage, long-lasting and reliable but allows only +- 9
degrees of throw. That is enough for this design because Babs has large ailerons and is intended
to be only mildly aerobatic. The Spangenberg linkage is not mechanically adjustable so throw,
differential and center positions must be fine-tuned from the transmitter. Ailerons on separate
channels are recommended. For the less adventurous, a traditional external pushrod arrangement
is also shown on the plans.
Assembly starts with the flap. The flap is a sandwich of 1/64" ply outer surfaces over a
balsa core held together with finishing resin. The result is stiff and warp-free.
Route hinge recesses in the balsa flap core. Epoxy the hinges in place, flush with the surface.
Glue the flap layers together with finishing resin. Clamp and weight well.

Wing Assembly

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