SIG Four-Star 20EP, Инструкция по эксплуатации

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46. Glue on plywood top former FHR. Note on the plan that FHR tilts back towards the rear of the fuselage. There should be
approx. 2-3/8" between the top of FHR and the top of former F-4T.
47.
From 36" long balsa stock, cut to length and glue in place the five 3/32"x3/16" stringers for the top rear of the fuselage.
When glue is dry, sand the ends of the stringers flush with the front of former FHR and the rear of former F-6T.
48.
Glue in place the plywood fuselage top formers T-1 and T-2. They should be perpendicular to the fuselage top.
49.
Cut to length and glue in place a 3/32"x3/16" top stringer for the front of the fuselage, running from the firewall F-1 back to
T-2.
50.
Use a flat sanding block to bevel the top edge of the fuselage sides to blend into the curve of F-1, T-1, and T-2, as shown.
Continue this bevel from F-1 back to former F-3.
51a.
A piece of 3/32"x3"x13" piece of sheet balsa is provided for sheeting over the top front of the fuselage. On one end of the
sheet cut out a semi-circle approximately 3" diameter to form the edge of the cockpit. Exact diameter and shape is not
critical (an empty yogurt container is about the right size).
b.
Trial fit the balsa sheet over the top of formers F-1, T-1, and T-2. Dampen the outside, or top, of the sheet to help bend over
the top formers. When ready, glue the sheet in place to the formers, top stringer, and fuselage sides. Use tape and/or pins
to hold the sheet in place until the glue dries.
c.
When glue is dry, sand the edges of the top sheeting to blend with the fuselage sides.
52a.
Glue the two 1/4" square x 2-9/16" long hardwood Servo Mount Rails in place in
the fuselage. Refer to the plan for the approximate location. Be sure to check the
length of your particular servos to make sure you put enough space between the
rails to fit your servos.
b.
Mount your elevator and rudder servos onto the servo rails, using the hardware
that came with the servos.
53a.
Use a small round file, or rolled up piece of sandpaper, to give the rear edge of
the pushrod exit slot a slight bevel. This will increase the gluing area for the
pushrod tube. Do this to the exit slots on both sides of the fuselage.
b.
Slide a 19" long Nylon Pushrod Tube into the pushrod exit slot, as shown. Glue securely the tube to the slot with CA
adhesive. Repeat for the second tube on the other side of the fuselage.