Construction
(continued)
25.
Cowl -
Fit and bond one part F27 (sheet 01/08, 1/20 in. balsa) to each side of the motor
mount assembly. Engage the tabs on the sides of former F5. Align F27 against the sides
of F26. Ensure that the notches at the
front
of F27 align with the base of F26.
26.
Fit and bond F28 (sheet 07/08, 1/8 in. balsa) to the tabs on the
top
of each F22 of the motor
mount. Place F28 with the etched side facing
up
. Align F29 (sheet 07/08, 1/8 in. balsa)
within the etched lines on F28, and bond in place. Repeat this process, to install parts F30,
F31 (sheet 07/08, 1/8 in. balsa), and F32 (sheet 02/08, 1/20 in. balsa).
27.
Sanding -
Lightly sand the fuselage, removing excess glue and smoothing the joints
between parts. Sand the cowl laminations to match the contours of formers F5 and F24.
Sand and taper F25 from the
front
to the
back
, flush with the
bottom
of former F5. Round
the
bottom
edges of F27 to flow into F25. Sand F26 to match the profile shown on
Detail
Sheet 1 of 2.
Wings
Wing parts are designated with the letter “W” followed by a number. Parts have been numbered so that
the wing assembly follows a sequential order: W1 to W8.
28.
Wing Center Section -
Fit ribs W2 and W3 (sheet 04/08, 1/20 in. balsa) to spar W1 (sheet
08/08, 1/32 in. ply).
Ensure that ribs W2 are
inside
of ribs W3.
29.
Fit the
rear
of the wing
center
section part W4 (sheet 01/08, 1/20 in. balsa) to the tabs at the
rear
of ribs W2.
Note: Bond at the rear tabs only.
30.
Wrap W4 over the
top
of ribs W2. Engage the tabs at the
center
and
front
of the ribs, and to
the tab at the
center
of the spar W1. Hold the wing center section on a flat surface. Then
bond W4 along the full length of ribs W2.
31.
Right Wing -
Lay W5R (sheet 01/08, 1/20 in. balsa) on the work surface, with the etched
side facing
up
. Fit the tabs at the
rear
of ribs W6, W7, and W8 (sheet 04/08, 1/20 in. balsa)
to the slots at the
rear
of the wing panel. Refer to
Detail Sheet 2 of 2
for the correct
placement of the ribs. Bond the
rear
of the ribs to W5R with CA.
32.
Turn the wing panel over, and wrap the wing panel over the
top
of the ribs. Fit each rib into
notches along the
front
edge of the opening in the wing panel. Bond the ribs to the leading
edge of the wing, and at the notches and spar locations. Pick up the panel and examine
each rib, closing any gaps between the ribs and the wing panel. Bond with CA.
Repeat steps 31 and 32, to build the
left
wing panel. Start with W5L on the work surface,
with the etched side facing
up
.
Build Instructions
1928 Pietenpol Sky Scout UM
- Build Instructions © 2015 Stevens AeroModel, all rights reserved.
!
Page 14
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