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www.oldschoolmodels.com
Construction Manual
Step 6 - Wing Assembly (attach R6)
Position the R6/R7 assembly in position. Make sure it is vertical and
pin the rear tab to the building board. Do not glue yet.
Step 7 - Wing Assembly (attach first WB3s)
Remove two WB3 sheer web
pieces from one of the BP4 sheets.
Fit as shown, one in the front of
the spar, one in the rear. Make sure
that the tabs in WB3 slide into the
slots in R6 as this will guarantee
that R6 is held in vertically. When
satisfied with the fit, glue R6 and
both WB3 pieces to the bottom spar.
Step 8 - Wing Assembly (attach two R3)
Now you’ll need two R3 ribs from
BP3 and four WB3 sheer webs from
BP4. Position one R3 up against the
ends of the WB3 pieces from the
last step. Once located properly,
pin the rib’s rear tab to the board,
then fit two WB3s in place. When
satisfied with the fit and location,
glue these pieces in place. Working your way inward, attach the
other R3 and WB3 pieces in place.
Step 9 - Wing Assembly (attach two R5)
Next you’ll need two R5 ribs from
BP3 and four WB3 sheer webs from
BP4. Position one R5 up against the
ends of the WB3 pieces from step
8. Once located properly, pin the
rear tab to the board, then fit two of
the WB3s in place. When satisfied
with the fit and location, glue these
pieces in place. Working your way inward, attach the other R5 and
WB3 pieces in place.
Step 10 - Wing Assembly (attach two R4s)
Now you’ll need two R4 ribs from
BP2 and four WB3 sheer webs from
BP4. Position one R4 up against the
ends of the WB3 pieces from step
9. Once located properly, pin the
rear tab to the board, then fit two of
the WB3s in place. When satisfied
with the fit and location, glue these
pieces in place. Working your way inward, attach the other R4 and
WB3 pieces in place.
Step 11 - Wing Assembly (attach two hatch rails)
Cut two 3” long pieces cut from the
leftover 3/16” x 3/8” basswood cut
for the bottom spar. These will be
hatch mounting rails and slide into the
holes in both R5 ribs, then are glued
into position. Even if building as a 3
channel, we advise installing these.
Step 12 - Wing Assembly
(attach R3)
Locate one R3 rib from BP3 and two
WB2 sheer webs from BP4. Position
R3 up against the ends of the WB3
pieces from step 10. Once located
properly, pin the rear tab to the
board. Lightly tack the R3 to the
WB3 pieces. Once the glue has set,
you will cut away the center of the R3 rib, leaving a box as shown in
the photo. Then fit two of the WB3s in place. When satisfied with
the fit and location, glue these pieces in place.
Step 13 - Wing Assembly (attach R2)
Locate one R2 rib from LP4 and
two WB1 sheer webs from BP4.
Take care when removing R2 from
the sheet as it has two slots pre-cut
between where the spars would
fit. These slots will allow the center
portion of R2 to be removed later
on, but make sure R2 remains as a
single rib for now.
Position R2 up against the ends of the WB2 pieces from step 12.
Once located properly, pin the rear tab to the board. Again, lightly
tack the R2 to the WB2 pieces.
Step 14 - Wing Assembly (attach R2)
Fit two of the WB1s (from BP4) in place. Note that the WB1s have
a slight angle on one end and there is a small circle engraved. This
angled side should face the inner (root) rib, with angle tapering
upwards (circle on top). When satisfied with the fit and location,
glue these pieces in place.
Step 15 - Wing Assembly
(attach R1)
Locate one R1 rib from LP4 and take
care when removing it as it also has
two slots pre-cut between where
the spars would fit. These slots will
allow the center portion of R1 to be
removed later on, but make sure R1
remains as a single rib for now.
Position it up against the ends of the WB1 pieces from step 14.
Once located properly, pin the rear tab to the board. Lightly tack
the R1 to the WB1 pieces.
Step 16 - Wing Assembly
(cut leading edge)
Measure and cut one of the 1/4”
square balsa strips to create the
leading edge Press it into position
and glue to all the ribs.
Step 17 - Wing Assembly (cut upper sub-spars)
Measure and cut a 3/16”square balsa strip to create the upper sub-
spar. Press it into position and glue to all the ribs.
