Place a steel ruler on top of the control surface and with the knife blade at a 30 degree angle,
undercut a section from the edge.
Sand a bevel on both sides of the edges of the
control surfaces on all the other edges except
the undercut one. For long straight edges it may
be easier to use the edge of a table to support
the foam as you sand.
For the vertical stabilizers sand a bevel
into all edges except on one side at the
bottom where they will be glued to the wings.
Glue the control horns in place ensuring they are on the same side of the control surface as the
bevel. On this airframe the bevel is on the upper surface of the control surface.
Glue the canopy former into the
canopy side pieces and set aside to dry.
Once dry, also glue the
front piece in place. Ensure
all the pieces are at right
angles and the gap between
the sides is uniform.
30 degrees
Except these edges on one side of the stabilizer
Plywood brace at the back
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