Jumper 25
Instruction Man u al
12
8) Using a modeling knife, carefully
re move the covering that overlaps the
sta bi liz er mount ing plat form sides in the
fuselage. Re move the cov er ing from both
the top and the bottom of the plat form sides.
9) When you are sure that everything is
aligned correctly, mix up a generous amount
of Flash 30 Minute Epoxy. Apply a thin lay er to
the top and bottom of the sta bi liz er mount ing
area and to the sta bi liz er mount ing plat form
sides in the fu se lage. Slide the sta bi liz er in
place and re align. Dou ble check all of your
mea sure ments once more be fore the ep oxy
cures. Hold the sta bi liz er in place with T-pins or
mask ing tape and re move any ex cess ep oxy
using a paper tow el and rub bing al co hol.
Jumper 25
HORIZONTAL STABILIZER.
PARTS REQUIRED
{1} Horizontal Stabilizer with Elevator
Halves
ALIGNING THE HORIZONTAL STABILIZER
1) Using a ruler and a pen, locate the
centerline of the hor i zon tal stabilizer, at the
trail ing edge, and place a mark. Use a tri an gle
and extend this mark, from back to front,
across the top of the stabilizer. Also extend
this mark down the back of the trail ing edge
of the stabilizer.
4) Install the wing onto the fuselage. Align
the cen ter line drawn on the top and the rear of
the sta bi liz er with the center of the fu se lage.
When that is aligned, hold the sta bi liz er in that
po si tion us ing T-pins or masking tape. Align
the hor i zon tal sta bi liz er with the wing. When
viewed from the rear, the hor i zon tal sta bi liz er
should be level with the wing. If it is not lev el,
use sand pa per and sand down the high side
of the sta bi liz er mount ing plat form until the
prop er align ment is achieved. The tips of the
sta bi liz er should also be equal dis tance from
the tips of the wing.
The top of the stabilizer does
not
have
the hinge pins exposed.
2) Using a modeling knife, carefully
re move the cov er ing from over the vertical
sta bi liz er mount ing slot in the top of the
fu se lage.
3) Slide the stabilizer into place in the
pre cut slot in the rear of the fuselage. The
sta bi liz er should be pushed fi rmly against the
front of the slot.
5) When you are satisfied with the
align ment, hold the stabilizer in place with T-
pins or mask ing tape, but do not glue at this
time.
MOUNTING THE HORIZONTAL STABILIZER
6) With the stabilizer held fi rmly in place,
use a pen and draw lines onto the stabilizer
where it and the fu se lage sides meet. Do this
on both the right and left sides and top and
bottom of the sta bi liz er.
7) Remove the sta bi liz er. Us ing the lines
you just drew as a guide, carefully re move the
cov er ing from be tween them us ing a mod el ing
knife.
When cutting through the covering to
re move it, cut with only enough pres sure
to only cut through the covering it self.
Cut ting into the balsa struc ture may weak en
it.