Section 6: Wing Mounting - Model Tech Magic Formula 3D ARF Manual

Mix a generous amount of 30 minute epoxy. Working with only one wing panel for now, apply a thin layer of epoxy inside the wing
joiner box and to only half of the wing joiner. Make sure to cover the top and bottom, as well as the sides, and use enough epoxy to
fill any gaps.
WARNING Use only 30 or 45 minute epoxy to install the wing joiner and to join the wing panels together. Do not use 5
minute epoxy. It is not strong enough. If you use 5 minute epoxy, the wing will fail during flight.
Slide the wing joiner into the wing panel up to the centerline mark. Quickly remove any excess epoxy, using a paper towel and
rubbing alcohol, and allow the epoxy to set up before proceeding.
After the epoxy has set up, test-fit both wing panels together again to double-check that they still fit together properly. Check the
leading and trailing edges, too. It's important that they be even with each other.
Mix a generous amount of 30 minute epoxy and apply a thin layer to the exposed half of the wing joiner, the inside of the wing
joiner box in the second wing panel, and the entire surface of BOTH root ribs. Make sure to use enough epoxy to fill any gaps.
IMPORTANT It is of the utmost importance to the integrity of the wing center-section joint that you apply a generous amount
of epoxy to both root ribs and the wing joiner. Not using enough epoxy can result in wing failure during flight.
Slide the two wing panels together and realign them. Quickly wipe away any excess epoxy, using a paper towel and rubbing
alcohol, and use pieces of masking tape to hold the two wing panels aligned until the epoxy fully cures.
STEP 4: CHECKING THE WING CENTER-SECTION JOINT
Once the epoxy has fully cured, remove the masking tape and double-check the center-section joint. If any gaps are present,
mix a small quantity of 30 minute epoxy and carefully fill any remaining gaps.
IMPORTANT Do not omit this procedure. The wing panels should fit together tightly, but it's possible to have some small gaps
that appear after the epoxy has cured. To make the wing center-section joint as strong as possible, it's important to fill any gaps,
using 30 minute epoxy.

SECTION 6: WING MOUNTING

(1) Fuselage
(2) Plywood Wing-Screw Doubler (W35)
Kwik Bond Thick C/A
# 2 Phillips Head Screwdriver
Excel Modeling Knife
STEP 1: INSTALLING THE WING-SCREW DOUBLER
YOU'LL NEED THE FOLLOWING PARTS FROM THE KIT:
YOU'LL NEED THE FOLLOWING TOOLS AND SUPPLIES:
from over the top and bottom of the two predrilled wing-screw mounting
holes in the trailing edge of the wing. The holes are located 5/8" in front
of the trailing edge and 3/4" out from the center-section joint.
(2) M4 x 40mm Machine Screws
(2) M4 Flat Washers
Ernst Airplane Stand
Ruler
Pencil
Using a modeling knife, cut away and remove the covering material
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