Construction Manual
www.oldschoolmodels.com
Page 15
the rear of the fuselage, remove the tape.
Now place the vertical fi n in position and
"eyeball" down the fuselage. With the
fuselage sitting fl at on your building surface,
the vertical fi n should point straight up.
If not, remove the fi n and sand the inside
edges of the rear of the fuselage to adjust
as needed. Once you're satisfi ed with the
position, glue the fi n in position, making
sure it's glued to the fuselage framing on both sides, as well as the
front cross-framing which should be in place below the fuselage
longerons. You can also fi ll the gap between the rudder the top of
the fuselage framing with some scrap 3/32" balsa sheeting.
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Step 107 - Fuse Assembly (Horizontal stab)
With the fi n in place, now it's
time to attach the stab. Again,
with the wing attached, you'll
need to position the stab so it's
centered on the fuselage and level
with the wings. Sand the rear longerons
as needed to make sure the stab is
level, then adjust the stab side-to-
side for the correct alignment.
The distance from the port stab tip
to the port wing tip should be the
same as the starboard stab tip to
starboard wing tip.
When you have it in the correct spot, use a pencil to draw some
alignment marks onto the stab, where it intersects the fuselage.
Then remove the stab, apply some glue and attach it permanently
right back in the place it was.
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Step 108 - Wing Assembly (FS3)
While the wing is still on the
fuselage, let's do a couple of
fi nish items.
Looking down from the top,
use a pencil and straight-edge
to lightly draw a line onto the
wing's center section sheeting,
denoting a continuation of the
fuselage's outer edge.
Now locate both FS3s from LP6. These are glued in place - TO THE
WING ONLY, as shown here - following the line you just drew. The
piece should be fl ush with the aft saddle opening and extend to
just shy of the wing spars. Do this for both sides.
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Step 109 - Wing Assembly (FS2)
And now locate both FS2s from LP5.
These are also glued in place - TO THE
WING ONLY, as shown here - following
the line you drew. This time these
pieces will be fl ush with the forward
edges saddle opening and extend to just shy of the wing spars.
Do this for both sides,
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Step 110 - Wing Assembly (F3, F4)
Locate F3 from LP6 and F4 from LP5. F3 is used to span the open
space between the two FS3s, and F4 is used between the two FS2s.
Dry fi t these fi rst, sand as necessary, then lightly tack these in
position to the wing and to the FS3/FS4 parts. NOT TO THE
FUSELAGE.
When the glue has cured, lightly sand the top of the wing saddle
area to make sure all of the pieces you just glued in are fl ush with
the top framing of the fuselage.
You can now remove the wing from the fuselage. Now go back and
add a bit of reinforcing glue to FS2, FS3, F3 and F4 joints. Now set
the wing aside.
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Step 111 - Hatch Assembly (Latch)
Grab the hatch that you created several steps back. Also locate
the 4-40 x 1 socket head cap screw, three 4-40 lock nuts, fi ve #4
washers, and the 4-40 nut from the hardware bag. Also grab both
L1s from LP8. These are all used to create the latch for the back
of the hatch area. Your mileage may vary, but all of our prototypes
this combination of components, in this order worked quite well:
Place 2 washers on the 4-40 x 1 screw.
Then one L1.
Then another washer.
Now turn a lock nut all the way down
the screw's thread, to hold these
parts together - but don't crush them.
Tighten the nut tight enough so L1
won't be able to spin on it's own.
Add one more washer, then push this
all through the top of the hatch, into the pre-cut hole.
Now add one more washer, then thread on another lock nut. Thread
the nut on so it's snug, but not tight. You want this assembly to
move, but not be sloppy-loose.
Then thread the last lock nut on a little ways, and then the other L1.
Lastly, add the 4-40 nut and tighten it so it holds L1 fi rmly to the
lock nut.
We found it best of both L1s point the same direction, so you'll it's
easy to tell when the hatch is locked from the outside.
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Step 112 - Hatch Assembly (Latch)
Now test fi t the hatch to the
fuselage. You'll notice that the aft
end of the hatch can move side to
side a bit, so let's fi x that.
Center up the hatch on the fuselage
and make sure it's pushed forward,
up-against the back of the fi rewall. Temporary tape it in position.
Now you need to use a pencil to mark a line of the bottom of the
fuselage, where F2 touches it. Remove the hatch from the fuselage.
Locate a bit of the 1/8" sq. basswood you used for the hatch
framing. Cut a piece that's roughly about 2" long and glue it to
the hatch, just forward of the line you just scribed, making sure it's
centered on the hatch.
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Step 113 - Wing Assembly (Aileron exit)
If you're fl ying with ailerons, cut a
hole in the middle section, similar to
what's shown here. It's also shown
on the plans. This is allow the aileron
wires to exit the wing.
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