back to index 1. Sanding Dihedral Angle and Installing Carbon Spars 1. Remove wings from beds. Using a flat sanding block and 100-grit sandpaper, sand the correct dihedral angle into the root of one wing half. Make sure to use light sanding pressure and check your progress often by measuring the dihedral amount. With one wing laying flat against the work surface, the raised wingtip should be 30 to 35mm above the work surface (i.e. the total amount of dihedral is 30 to 35 mm, or approximately 15 to 18 mm per side). Take your time during this step and be extremely careful not to gouge the foam. The dihedral angle is important, and if excessive dihedral is used, side arm launch performance will deteriorate. 2. Locate four carbon spar rods (each 180mm long). De-bur the ends of the rods with sandpaper. Slide carbon spars, starting at the root, into pre-cut spar slots until the ends are flush with the root of the wing. DO NOT glue spars in place at this time.   3. After inserting all four spars, sight down trailing edge of each wing half to check for straightness. If trailing edge is curved, gently bend wing until straight. The trailing edge must be straight to prevent hinge from binding after elevon is attached. Handle wing halves with care to avoid bending them.   4. Attach narrower applicator nozzle to bottle of thin CA glue. While holding the wing at a 45 degree angle, start dripping thin CA glue into spar slot, starting at the high part of the wing (whether the root or the wingtip is the highest point does not matter) and moving slowly to the lowest part. Holding the wing at an angle prevents the CA from gushing out and allows the excess CA to run down the slot, ensuring an even bond. When the first spar is bonded in position along its entire length, flip wing over and repeat gluing process with other spar. Carefully stand first wing-half on its leading edge and allow CA to cure for approximately 15 minutes. Repeat spar installation with other wing half. 5. After CA cures, lightly sand wings with a sanding block and 150 grit sandpaper. Smooth out any rough areas on the surface. Be extremely careful not to gouge the foam and use light pressure while sanding.   6. Slightly round wingtips using sanding block and 150 grit sandpaper. Use very light pressure and be careful not to gouge foam. 7. Remove loose dust from wing by tapping wing against your hand. You could also use a vacuum or tack rag.     2. Installing Antenna All text, images and other content © 2003 Richter R/C. All rights reserved.