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Approach Engineering AH1 "W" Cobra Assembly Instructions Manual

Approach engineering ah1 "w" cobra assembly instructions
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A H 1 " W " C O B R A
D E S I G N E D F O R T H E S W I F T 1 6
APPROACH ENGINEERING
WWW.APPROACHENGINEERING.COM

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Summary of Contents for Approach Engineering AH1 "W" Cobra

  • Page 1 A H 1 ” W ” C O B R A D E S I G N E D F O R T H E S W I F T 1 6 APPROACH ENGINEERING WWW.APPROACHENGINEERING.COM...

  • Page 2: Tools Required

    APPROACH ENGINEERING 1.0 Purpose To establish a process that ensures control and standardization in the manufacturing of AH-1W Cobra for use with Swift 16 electric mechanics. 2.0 Tools Required Note: (A) denotes tools required for assembly and (T) denotes tools required for testing.

  • Page 3: Fuselage Assembly

    6.0 FUSELAGE ASSEMBLY Locate fuselage side pieces S1, S2 and S3. Glue these NOTE: before beginning, read through to step 6.4 and together to make a left and right fuselage side. Add triangle determine which assembly procedure you will use. Punch out stock as shown.
  • Page 4 6.0 FUSELAGE ASSEMBLY Turn the fuselage over and add the 1/4” square corner Now install 3/32” cross-grain sheeting from bulkhead F3 stock as shown. Epoxy in the forward landing gear support to bulkhead F4. The sheeting should only cover half of F4, leav- block, and the rear gear doublers making sure that the holes ing a ledge for the next bottom skin sheet, BS1.
  • Page 5 6.0 FUSELAGE ASSEMBLY 6.13 6.14 Punch out the two 1/8” light ply vertical fin supports Assemble the two belt idlers pulleys as shown. The VFS and two tail rotor tube supports (TSR). The rounded edge chamfered edge of the pulleys should face inward to help guide of the tail rotor tube support faces foreword.
  • Page 6 6.0 FUSELAGE ASSEMBLY 6.19 6.20 Cut out the 1/8” ply trailing edge former (TE-2) and glue Pull out the larger diameter, longer, tail rotor tube. Using it into the notches provided on the top of the vertical fin assem- 30 minute epoxy glue to the vertical frame so that the bottom bly.
  • Page 7 6.0 FUSELAGE ASSEMBLY 6.25 6.26 Once the nose blocks are sanded to the proper contour, Install the balsa canopy retainer side rails CRR. dremel out the bottom of the nose blocks where they meet bulk- head F3. Using the existing oval hole in F3, form an air intake Balsa side rails CRR for the battery compartment.
  • Page 8 6.0 FUSELAGE ASSEMBLY 6.31 6.32 Before adding the fuselage top and bottom sheeting, in- Using scrap plywood secure the nyrod away from con- stall the rudder control nyrod in the fuselage. It must be routed tacting the pulleys. so it is free of binding, and does not contact the belt drive or pulleys.
  • Page 9 7.0 FUSELAGE ASSEMBLY Install a piece of 5/8” triangle stock for the vertical tail Before proceeding further, adjust the tail housing height to leading edge. Make a paper template for the correct shape of 1 5/8” . This will provide the proper position for setting the belt the left and right skins.
  • Page 10 7.0 FUSELAGE ASSEMBLY Add transmission housing bulkheads TB1, TB2, TB3 and Assemble the exhaust frame by punching out EXH1, TB4 to the trans housing skins. EXH2, EXH3, EXH4, EXH5, EXH6. First place EXH2 and EXH5 between EXH 3 and 4. Then place this assembly on top of EXH1.
  • Page 11 8.0 FUSELAGE ASSEMBLY Make small paper templates and apply the transmission Continue sheeting small sections, wetting the wood to aid housing sheeting using the supplied balsa sheet stock. Keep in in contouring around curves. mind that the trans housing will be split in the middle when complete.
  • Page 12 9.0 ENGINE AND TRANSMISSION BAY ASSEMBLY– INTAKE AND EXHAUST The intakes, exhausts and the exhaust center frame are Punch out the 10 INT intake pieces, and 18 EXH pieces. Assem- ble the intakes 5 per side, and exhaust 9 per side. Glue in place and glued to the rear transmission housing, and stay attached to it sand to shape.
  • Page 13 9.0 Wing assemblies 9.7 Locate the 1/4” x 11.5” wing spar dowel. Cut it 9.8 WR1—5 have a flat spot to aid in alignment. into two 4” long pieces. This will allow 1/4” spar Using the skin as a guide, space the ribs 7/8” inches insertion into the fuselage.
  • Page 14 9.0 FUSELAGE ASSEMBLY— VERTICAL TAIL CAP & LANDING GEAR 9.13 9.14 Locate vertical tail cap ribs TR1 and TR2. Cut a piece of Make a paper template for the two side skins, and using 5/8” triangle stock 1 5/8” in length. Glue the two ribs to the that template cut out two skins out of the supplied sheet stock.
  • Page 15 9.0 ENGINE AND TRANSMISSION BAY ASSEMBLY 9.19 9.20 Remove the forward plastic tray from your Prior to installing the chassis, the top frame inside the rear transmission housing must be removed for clearance. Re- swift. It is not necessary in the chassis. move the section marked below.
  • Page 16 18.0 APPENDIX 9.24 The model is ready for final contour sanding and the finish method of your choice. You may apply an elaborate detailed paint scheme, or simply cover it with any of the available colored plastic films. Add arma- ment details as desired.
  • Page 17 18.0 APPENDIX AH-1W COBRA—ELECTRIC Page 17...