16
Step 1.
Locate the forward mounting bolt holes in the wing.
Trim the covering from the mounting bolt holes with a sharp
hobby knife
Step 2.
Place the wing onto the fuselage. Use care as the first
few times the wing is inserted, the fit is snug. Note the tolerance
between the wing and the fuselage. There is little movement of
the wing once it is in the fuselage wing saddle area. You can
check the alignment of the wing to the centerline of the fuselage
by making a reference mark at the tail of the fuselage, then
measuring each wing tip to make sure the wing is aligned.
Step 3.
With the wing centered in the fuselage wing saddle
area, secure it with masking tape so it will not move from side to
side. Measure from wing-tip to the center of the fuselage at the
rear. When you are satisfied with the alignment then proceed.
Step 4.
Using the front wing bolt holes as a guide, drill through
the wing and plywood wing support in the fuselage with a
1
/
4
”
drill bit. Drill 90 degrees to the centerline of the wing chord.
Step 5.
Use the holes in the top wing bolt plates at the trailing
edge of the wing as a guide to drill two holes into the plywood
wing support at the rear of the hatch area in the fuselage. Again,
drill at 90 degrees to the wing chord line.
Step 6.
Remove the wing from the fuselage. Trial fit the blind
nuts into position under the fuselage plywood wing supports at
the front and back of the fuselage hatch opening. Use pliers with
an adjustable opening to squeeze the blind nuts into position so
the “teeth” penetrate the wood and stay in place.
Note:
It is a good idea to place a piece of scrap wood on the
top side of the plywood wing hold down blocks when
pressing the blind nuts into place.
Section 5: Mounting the Wing to the Fuselage
• Wing
• Fuselage
• Wing hold down hardware
• Hobby knife with #11 blade
• 30-minute epoxy
• Epoxy brush
• Mixing stick
• Rubbing alcohol
• Felt-tipped pen or pencil
Parts Needed
Tools and Adhesives Needed
• Pliers
• Ruler
• Drill
• Drill bit,
1
/
4
”
• Round file
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Ultra Aerobatic 1.20 ARF
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