CONSTRUCTION --------------------------------------------------------------------------- 1. Assemble a standard 18 mm Motor Mount and set aside. 2. Cut the pieces for the fins from their sheet stock, and assemble as shown on the plans. Use weights, jigs, and clamps to maintain their alignment until dry. 3. Wrap a piece of 220 grit sandpaper around the BT-50L tube, taping it in place. Carefully sand one of the wide faces of the long balsa strip with the sandpaper tube until a matching channel is created in the piece. Cut and sand the front angle into the strip as shown. 4. Take one of the two BT-5T tubes and place two marks, 180 degrees apart, at one end. Draw lines carefully the full length of the tube. Using a fresh #11 blade, and a metal straight edge ruler, cut the tube along both lines so that you have two identical half tubes. The remaining BT-5T will not be needed unless you make a mistake in this step. 5. Take one of the two BT-20B tubes, and do the same as in step 4. 6. Using slow, careful cuts with a fine-toothed razor saw, cut one of the BNC-5E nose cones into two identical pieces. Using the BT-50 sanding tool from step 3, sand a matching channel into the now-flat faces of both cone halves. 7. Take two of the CR-520 rings and carefully cut these into two identical pieces. Sand the contour of the BT-50 into the cut edges of these ring halves. 8. Glue one half cone and one half-BT-5T together, and set aside. Repeat with the other half-cone and half-BT-5T. These assemblies will become the intake reducer cones. 9. Glue one half-ring inside the BT-20B half-tube flush with one end. This will become the REAR of the engine shroud. Glue a second half-ring 1" back from the FRONT end. Set aside, and repeat these steps with the other half- tube BT-20B. When dry, draw a line the full length of the half-tube exactly halfway from each cut edge. This will be an alignment line. 10. With the contoured faces of the intake reducer cones resting on a flat surface, draw a line lengthwise from the tip of the half-cone to the rear edge of the half tube, exactly halfway from each side. Repeat for the other intake cone. 11. Remove the sandpaper from the BT-50L tube. Mark this tube for four fins and draw lines the full length of the tube at each mark. 12. On one of the lines from step 11, place a mark 7 5/8" from one end. Draw a line completely around the tube at this mark. This is the limit line for placing the intake cones. Select one of these lines and carefully glue one of the intake cones to the BT-50L, following the pattern in the PROFILE VIEW. Make sure the alignment line on the intake assembly matches the line on the BT-50L. Use low-tack tape or rubber bands to secure this in place until the glue has completely dried. When dry, remove the tape and repeat this step for the other intake cone, on the line 180 degrees opposite to this one. 13. Take one of the engine shroud assemblies from step 9, and attach this to the BT-50L as shown in the PROFILE VIEW. The forward half-ring should set on top of the intake cone, and the rear half-ring should be flush with the rear of the BT-50L. The alignment line on the shroud should be even with the line on the BT-50L. Tape or rubber band this to the BT-50L in several places to ensure a complete bond. When dry, repeat this step for the other shroud. Cut the two body wraps from 0.020" thick scribed styrene, with the scribing running fore-aft to the body, and slightly oversize. Make adjustments to the size carefully and evenly to the top and bottom until the wraps fit over the BT-20B half-tube, and against the BT-50L. The wraps should overlap the BT-20 section by half the distance of the narrowest fore-aft dimension. See the PROFILE VIEW for the proper fit. 14. Select one of the remaining two lines on the BT-50L to be the TOP of the tube. Mark both ends of the instrument tunnel from step 3 halfway from side to side in the wide dimension. Attach this to the top of the BT-50L, with the squared end to the rear, and the angled end to the front, as seen in the TOP VIEW and the PROFILE VIEW. The rear of the tunnel should be even with the rear of the BT-50L. Allow to dry. 15. Using the REAR VIEW as a guide, mark and draw lines for the subfins, main wings, and v-fin. Sand all of the assembled fin pieces flat, and round the leading, trailing, and tip edges of all pieces. Do not round the root edges. Attach these to the BT-50L using the double-glue method found in Stine's Handbook. Use weights, jigs, and clamps to hold these pieces in alignment until dry. 16. Apply a heavy layer of glue about 1" wide inside the rear of the BT-50L at a depth of 3/4" from the end. Insert and push forward the motor mount from step 1, aligning the motor hook with the bottom alignment line, and with the motor tube even with the end of the BT-50L. Allow to dry. 17. Mark the bottom line 5" from the rear, and attach the launch lug to the line, with the front of the lug touching this mark. Allow to dry. 18. Thread the screw eye into the base of the BNC-50X nose cone, carefully remove, and force glue into the hole. Reinsert the screw eye. 19. Assemble the parachute and attach the shroud lines to a swivel. Attach the shock chord to the inside of the BT-50L tube, at least 1" back from the front of the tube. Allow to dry. Attach the other end of the shock chord to another swivel, then attach both swivels to the screw eye. 20. Prime, sand, and finish the model in a color scheme of your choice. Spray a clear gloss coat over the color coats, allow to dry, and apply the decals of your choice. When the decals have fully dried, spray another clear coat over the decals and let dry. 21. GO FLY!