- 6 -
20.
Once you’re happy that everything will fit
together properly, use epoxy to glue these
pieces of spruce to the outer wing panels
and into the slots in the fixed balsa trailing
edge and hold in place with masking tape
while curing. If using 5 minute epoxy just
do one side at a time so you have adequate
working time to get them aligned and
secured properly.
21.
Once the glue has fully cured, trim and
sand off any glue along the glue lines of
the drag spars and balsa trailing edge and
any parts of the balsa trailing edge or drag
spars that are protruding above the surface of the foam (mainly along the outer wing panels
towards the wing tips). The aim is to create a smooth transition from the foam portion of the
wing to the spruce and balsa trailing edge of the wing so that there’s a nice continuation of
the slightly reflexed airfoil shape. This is important both from an aerodynamic point of view
and for aesthetics (so the transition is not noticeable once the model is covered).
22.
Locate the two balsa elevon pieces and cut out along the lines marked. You will have a left
and a right elevon, each orientated so that their narrower end is at the wing tip.
23.
Using a sanding block, sand a 45 degree
bevel along the leading edge of each
elevon, with the 45 degree opening on their
bottom surface (ie. they’ll be hinged on top
surface).
24.
Round off the top and bottom edges of
each end of both elevons to make covering
easier. Put them aside to be installed later.
25.
Round off the top and bottom edges of
each wing tip using a sharp knife. You may
also wish to round the leading edge corners
of the wing tips when viewed from above.
26.
Locate the piece of coreflute supplied in
the kit and cut out the two fins as marked.
27.
Mark out where the slots for the fins will
go on the wing. You’ll need a slot 2mm to
3mm (3/32” to 1/8”) wide and 75mm (3”)
long, with the rear of the slot starting
40mm (1 1/2”) forward of the rear edge of
the outer panels spruce drag spar (edge of
foam if no drag spar installed). It should be
positioned just slightly inboard of the panel
join line.
28.
The area of the wing behind the fin slots in
reinforced with the supplied carbon ribbon.
Cut the length of carbon ribbon exactly in
half for use as two reinforcement spars.
