Great Planes Ultra Sport 40 Plus Kit - GPMA0390 - Manual (Page 16)

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19. Locate one 1/16" x 1/2" x 30" [1.6mm x 13mm x
760mm] balsa sub-leading edge. Glue it in place in front of
all ribs with medium CA. After gluing it in place, lightly sand
the top and bottom of the sub-leading edge with a sanding
bar, making sure it matches the shape of the ribs. Sand the
ends to fit the ribs.
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20. Fixed and Retractable Mains/Fixed Tailwheel.
Locate the die-cut 1/8" [3.2mm] lite-ply sub-leading edge
doubler (SED) and glue it with epoxy to the sub-leading
edge between ribs W3 and W4. After the glue has cured,
lightly sand SED until it matches the shape of the ribs.
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21. Fixed Mains and Tailwheel. Locate the die-cut
1/8" [3.2mm] lite-ply ribs W3-A, WL-A, and W4-A. Use
epoxy to glue them in place as shown on the wing plan.
Also, use epoxy on the cuts on the ribs. After the epoxy has
cured, sand the ribs smooth with the top and bottom
surfaces of the wing.
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22. Fixed Mains and Tailwheel. Locate one of the
1/2" x 3/4" x 5-1/2" [13mm x 19mm x 140mm] hardwood
landing gear rails. Cut the rail into two pieces, one 4-1/4"
[108mm] long and another 5/8" [16mm] long. Glue them in
place as shown using epoxy. Drill a 5/32" [4mm] hole
through the slot in the vertical rail into the horizontal rail.
This is for the landing gear wire.
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23. Retractable Mains/Fixed Tailwheel. Locate the
die-cut 1/8" [3.2mm] lite-ply ribs W3-A, WL-A, and W4-A.
Make straight lines between the top of the pre-cut edges
and cut the material out as shown in the above image.
Locate the 1/4" x 1/2" x 8" [6.4mm x 13mm x 203mm]
hardwood stick and cut it in four pieces 1-7/8" [48mm] long.
You will use two pieces on each retractable landing gear
mount on each wing.
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24. Retractable Mains/Fixed Tailwheel. Glue W3-A,
WL-A and W4-A as shown in the above image using epoxy.
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