3M Super 77 Spray Adhesive is the recommended adhesive for the assembly of the Zagi- 5C. Since the Zagi-5C is all EPP the 77 Spray Adhesive will not damage the foam. Shoe Goo, Goop, or any of the other Goo or goop adhesives can be used with a weight penalty of one to three ounces.
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The Zagi-5C Kit Contents: Expanded polypropylene (EPP) wing panels and beds Pre-cut airfoil shaped balsa elevons .03 X .31 X 24 Carbon fiber spars Roll 2.2 mil color poly tape Control horns with 2 screw plates and 4 screws Threaded 2-56 control rods...
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There are three parts to each wing panel. The wing core is shipped between the top and bottom beds. The beds are used as construction jigs so do not discard them. The top of the wing can be identified by its greater curvature. The right wing is the wing that would be on your right if you were in the cockpit.
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Tape the top beds together with fiber filament tape. Then tape the bottom beds together. Remove the hairs and zigzags from the wing cores and beds by rubbing them with EPP foam block. Lay the bottom beds on a flat surface. Set the wing cores on the beds top side up and lightly block sand the wing panels (cores) with #150 or #320 sandpaper.
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It’s a good idea at this point to let the glue dry overnight or at least a few hours. The Zagi 5C servo bay was designed to fit standard servos. Standard servos are cheap and rugged with more than adequate torque.
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Computer radios have settings for elevon mixing. Check the radio manual for flying wing, elevon or delta-wing mix setting. V-tail settings will not work. Set the transmitter for elevons and deter- mine the appropriate receiver slot for the controls. Position the servos the way they will be in the wings, with the control arms facing outboard.
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Remove the pre-cut electronics bay cookie from the center of the wing. Save the cookie, it will be used later. The servo bays are cookie cutouts in the shape of a servos. The cutouts are not easy to see. Poking a finger from the bottom while inspecting the top helps.
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Lay the wing in the bottom beds. Spray a medium mist coat of adhesive on the top side of the wing. Make sure that the walls of the electronics bay are covered. Let the adhesive dry for 15 minutes before taping. The fiber tape will not appear as dark as pictured here.
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Spray another mist coat of adhesive on all top surfaces of the wing including the areas covered with fiber tape. Make sure to spray the tips and trailing edges. Spray 2 inches of the bottom of the wing at the TE. Let the adhesive dry for 20 minutes. Put the wing top side up in the bottom beds.
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Fold the tape around the tip and cut it to the contour of the bottom surface. Trim and fold the tape into the battery, servo and receiver bays. Cover and trim the top left wing panel. Repeat the same taping procedure as on the right panel.
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Position the elevon against the TE. Position a straight-edge parallel to the center line at the inboard edge of the servo bay. Make a cut line on the elevon. Position the straight-edge to match the angle of the wing tip. Make a cut line on the elevon to match the wing tip.
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Align a straight-edge from the outboard side of the servo control arm to the elevon parallel to the center line. Make a line on the elevon. Align the control horn to the line on the elevon in line with the servo control arm.
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Using a straight-edge as a guide, make a half-inch deep cut for the servo wire channels. The channels go between the servo wires, where they exit the servos, to the middle of the electronics bay. Push the servo wires into the channels with a flat blade screw- driver.
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Use the cookie that was removed from the electronics bay to make a hatch cover. Use the curved side to match the curvature of the wing. Spray and tape the cover. Fit the hatch cover to the electronics bay to make sure that it fits. Do not tape it in place until the wing is balanced.
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Nose heavy If the Zagi 5C requires reflex (up elevator) for level flight it is nose heavy. The weight in the nose pushes the nose down. The elevons compensate in the ‘up’ elevator position creating drag.
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2 or 3 clicks of trim in the opposite direction. If the wing pitches up and immediately dives, add 2 or 3 clicks of down trim. Repeat the glide test until the Zagi 5C flies straight ahead with a slow sink rate to a sliding landing.
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Trick R/C guarantees this kit to be free from defects in both workmanship and material at the date of purchase. This does not cover any components or parts damaged by use, misuse or modification. In no case shall Trick R/C’s liability exceed the original price of the purchased kit. Since Trick R/C has no control over the final assembly, no liability shall be assumed for any damage resulting from the use by the user of the final user-assembled product.
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