GREAT PLANES Ultra Sport 40 Plus, Инструкция по эксплуатации, Страница: 46 / 62

❏
7. Apply a plastic filler such as Bondo
®
to fill the seam
where the cowl halves are joined. After the filler has cured,
sand the seam until the two cowl halves blend smoothly
together.
❏
8. Wet sand the entire cowl with 400 grit wet or dry
sandpaper. The cowl is now ready to be primed and painted.
Once you are ready to install the cowl onto the fuselage, you
will use four #2 x 1/2" [13mm] screws with four #2 washers.
It is assumed that you have already covered a couple of
models in the past, so we won’t go into many details on
covering techniques, but here are some tips you should
consider.
❏
1. NEVER CUT THE COVERING DIRECTLY ON THE
SHEETING. The Ultra Sport 40 Plus depends on the
sheeting for some of its strength. Modelers who cut through
the covering tend to cut the sheeting and this will weaken
the structure.
❏
2. Use a Top Flite
®
Hot Sock
™
to minimize dents in the
wood from your covering iron.
❏
3. When you cover large sheeted surfaces such as the
wing, bond the covering in the middle and work outward,
pushing out air as you proceed. Do not move the iron in a
circular motion, but move it span-wise with the grain of
the wood.
❏
4. When you cover smaller parts with square edges such
as the elevators and ailerons, cover the edges first with
separate pieces of covering. Then, all you have to do is wrap
the covering around the top and bottom and iron it down.
❏
5. When you cover sharp junctions like where the stab
meets the fuse, cut narrow strips of covering and apply them
in the corners before you cover the major surfaces. The
larger pieces of covering will overlap the smaller pieces.
This technique also eliminates the need to cut the covering
after it has been applied.
HOW TO CUT COVERING FROM BALSA
Use a soldering iron to cut the covering from the wing.
The tip of the soldering iron doesn’t have to be sharp, but
a fine tip does work best. Allow the iron to heat fully. Use
a straightedge to guide the soldering iron at a rate that will
just melt the covering and not burn into the wood. The
hotter the soldering iron, the faster it must travel to melt a
fine cut. Peel off the covering.
COVER THE MODEL WITH MONOKOTE ®
46