6. Install a carbon spar in the horizontal elevator to add strength and improve the function of the elevator.
7. Cut a slit with a razor blade 2.5" back from the front of the horizontal tail that is 12" wide leaving 3" on each end uncut.
8. Sand the flat carbon spar lightly so the CA glue will have a better grip.
9. Press the 12 " spar into the slot making sure that it does not poke out the top or the bottom along its length.
10. It helps to put a little baking soda along the spar to help the CA glue set. Baking soda is a catalyst for CA glue.
11. Use thin CA glue along the length of the spar. Make sure it is well secured.
12. If you are adding the spar to a plane that is already built, cut the slit as described and insert the spar. It may help to make a small
slit up into the vertical stab to be able to insert the spar.
POLYHEDRAL WING CONSTRUCTION
13. Lay the wing core on a flat surface, and determine which tip goes on which end. The tips should fit so that they angle upwards.
(The pre-cut slits in the tips go towards the center.)
14. Have a ruler to measure the height of the wing tips as you glue them.
15. Use your low-temp hot glue gun to glue the tips onto the wing core
with the tips up 5” from the TOP of the wing cores.
16. Lay a bead of hot glue along the seam between the wing portions, to fill in any gaps, and smooth with a flat tool as the glue dries.
17. There are 2 fiberglass spars included in the kit
—1 for the bottom center of the wing, and 1 for the top center of the wing.
18. Lightly sand the fiberglass spars so the glue will stick to them.
19. Some kits have the spar slots precut, if yours does not you will need to cut the spar slots.
20. Lay the spar on top of the wing, and slide the ends of the spar through the pre-cut slits
that are 4” back in the wing tips.
21. Place hot glue into the slot, and replace the spar, with the ends through the slits in the wing tips. Make sure both ends of the spar
are seated completely down through the pre-cut slits in the wing tip, so that the spar lays flat.
22. Fill in the pre-cut slits in the wing tips with hot glue, especially around the spar that goes through it.
23. Turn the wing over, and use snips to cut off any excess spar sticking out of the slits.
24. Install the spar on the bottom of the center wing section.
