Creative Woodworks & crafts 2003-04, страница 29
MT300 Ourpe*« i Nit?* uot-WVeit In Heaven blade cut as if it had set in the teeth on one side but not on the other. In order to make a straight line cut in the saw block, it must be fed into the blade at an angle. This angle will depend on the burr for the individual blade being used; for the No. 2 blade used for this project, the angle was about 10 to 15 degrees. This project has long top and side view patterns for the helicopter body and requires several long straight cuts. You may want to practice making these cuts. If you end up with a surface that is not completely flat, you can use a flat sheet of sandpaper or the small files to smooth up some ot the uneven areas. Helicopter body The first step is to drill a starter hole in the window area in the side view of the body. (At the same time, you can also drill between the struts in the side view of the strut patterns to get that saw block ready too.) The first cut for the body is to saw out the side window area. Put the saw blade through the starter hole to make the cut. Next is the top view. Be very careful in making the long straight cuts so that the sides of the body will be smooth and flat. Put masking tape over the saw cuts on the top and bottom of the block. Pinch the sides of the block together to keep the loose piece firmly in place as you put the tape on. Turn the saw block on the side to finish cutting. Start at the nose of the body and saw down to the bottom edge of the block and a small waste piece will fall away. Note: the bottom of the body is the bottom of the saw block. It helps to retape the block where this waste piece has been cut away. Start sawing again at the nose and go up over the top and around to the bottom again to finish the side view cutting. Landing struts Cut out the material between the struts in the side view. Insert the saw blade through the starter hole to do this cut. Next, go to the front view and cut out the material from between the struts. Go back to the side view and finish cutting completely around the side view. Tape the loose piece in place and then finish the front view cutting to complete the struts. Making the rotors Using the patterns, cut the two big rotor blades. You can make them from a flat piece of plastic such as an orange juice jug. You can pick almost any color you want by just looking at Arrow Fastener Co., Inc., 271 Mayhill Street, Saddle Brook, New Jersey 07663 Canada; Jardel Distributors, Inc., 6505 Metropolitan Blvd. East, Montreal, Quebec HIP 1X9 United Kingdom: Arrow Fastener (U.K.) Ltd., Unit 5 ZK Park, 23 Commerce Way, Croydon CRO 4ZS, Surrey vuvww.arrowfastener.com the variety of plastic jugs that you may find. Be sure to pick a flat area, use double-sided tape to stick the patterns to the material, and cut the pieces to shape. A good pair of scissors is needed to cut out the rotor blades. Peal the double-sided tape and patterns off of the blades after they have been cut. Use the awl to make a centered starter hole in the end of the 3/8" dowel rod. Drill a 1/2" deep hole with the 1/16"-Dia. bit. This is the first step in making the rotor hub. Sand the end of the dowel rod to a domed shape: this will be the top of the rotor hub. Rotor hub sawing fixture Cul Ihe 3/4" x 3" x 5" piece of wood to form a wedge with a 30 degree angle on the diagonal as seen in Fig. 2. Drive four wire nails into the diagonal edge of this fixture to firmly hold the dowel rod. Make a vertical pencil mark on the upper end of the dowel. Select a scroll saw blade with a thickness similar to the thickness of the rotor blade material. The slots that are cut in the rotor hub need to have a snug or slightly loose fit for the ends of the rotor blades. Don't pick a plastic jug that is too thick. Hold the dowel firmly on the top continued on page 30 Creative Woodworks S. Crafts April 2003 • 19 |
