GREAT PLANES Ryan STA EP Instruction Manual page 18

one wing half flat on your building board, block up the other
wing tip 2-1/4" [57.2mm] at the outer most rib W4. Sight
down the wing from the wing tip, checking that the main spar
and TE are straight. When satisfied with the fit, apply
30-minute epoxy to the back of the main spars, the surface
between the main spars, the front of the aft wing joiner, the
top and bottom edges of the forward wing joiner and the root
ribs. Slide everything back together. Make sure the wing
joiner is inserted to the centerline. Use masking tape to hold
the wing joiner tight against the main spars. Wipe off any
excess epoxy with a paper towel dampened with denatured
alcohol. Check that the one wing is blocked up 2-1/4"
[57.2mm] at rib W4.
5. From one of the 7" [177.8mm] pieces of 1/16" [1.6mm]
balsa you trimmed for the wing sheeting, cut and glue shear
webs on the back of the aft wing joiner.
6. Draw a centerline on the top (the side with the punch
mark) of the die-cut 1/16" [1.6mm] plywood wing bolt plate.
Use a sanding bar to bevel the edges as shown. Use a
hobby knife to score along the centerline. This will allow the
wing bolt plate to bend when it is glued to the bottom of
the wing.
7. Use epoxy to glue the wing bolt plate to the bottom of
the wing. The aft edge of the plate should be flush with the
TE of the wing.
8. Use a 3/16" [4.8mm] drill bit to enlarge the hole for the
3/16" [4.8mm] wing dowel in the LE of the wing.
9. Cut the 3/16" [4.8mm] hardwood wing dowel 2-1/4"
[57.2mm] long. Round both ends of the wing dowel and test
fit it in the wing. Do not glue it in until after the wing has been
covered.
10. From the remaining 1/8" x 1/4" [3.2mm x 6.4mm]
basswood main spar, cut and glue aileron hatch rails
between the W3A ribs.
11. From the remaining 3/32" x 1/2" [2.4mm x 12.7mm]
balsa sub LE, fit and glue a stick to the aft edge of the aft
aileron hatch rail. The stick must be slightly higher than the
bottom of the wing ribs so that it can be sanded flush with
the ribs. This will provide a surface for the covering to be
attached to.
12. Position the die-cut 3-ply aileron hatch in the
opening.You may need to sand the edges of the hatch to get
it to fit well. Drill 1/16" [1.6mm] pilot holes in each corner of
the hatch and into the rails. Remove the hatch and enlarge
the holes in it to 3/32" [2.4mm]. Countersink the holes in the
hatch to accept the #2 x 3/8" flat head screws. A Dremel
High Speed Steel Cutter #178 will make countersunk holes
easy. Secure the hatch to the hatch rails with the screws.
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