The Houston Hawk Project

  B I L L    O F    M A T E R I A L S
 

            We left the purchase of materials for the Houston Hawk up to each individual member / builder.  He could use the sources listed or purchase from different vendors.  Certain items that were difficult to purchase singly were ordered in bulk and member/builders shared the cost.  These items were Aluminum wing rods, Spruce Spars, Wing Ribs and shear web connectors.

             Costs in your particular area may be different than those in the Houston area.  However, we can share with the reader the general cost we have paid to date.

 
  QUANTITY DESCRIPTION APROX COST
       
    CARBON FIBER SPAR CAPS  
    two sets (upper & lower $30.00
  1 PAIR CL6-32 .060" X .5" X 36"  CF. SPAR CAPS (Aerospace Composites)  
  1 PAIR CL4-32 .030" X .5" X 36" CF. SPAR CAPS (Aerospace Composites)  
       
    KEVLAR TOW  
  1 UP-03 Kevlar Tow 1/8 X 30'  (Aerospace Composites) $2.00
       
    BALSA WOOD  
    Cost for Balsa and Plywood material listed was approximately $23.00 per plane including UPS ground shipping $23.00
  8 SHEETS 1/16" X 4" X 36" BALSA SHEETS  
    (NOTE:  4 FIRM AND 4 MEDIUM)  
  3 SHEETS 1//16" X 3" X 36" BALSA SHEETS  
  1 SHEET 1/4" X 2" X 36" BALSA SHEET  
  1 SHEET 1 /32" X 2" X 36" BALSA SHEET  
  1 SHEET 1/8" X 2" X 36 BALSA SHEET  
  1 PIECE 1/4" X 1" X 36" BALSA TRAILING EDGE STOCK  
  5 PIECES 3/16" X 3/4" BALSA TRAILING EDGE STOCK  
  1 PIECE 1/2" SQUARE X 36" BALSA STICK  
  2 PIECES 1/8" X 1/2" X 36"  HARD BALSA STICK  
    (THIS MATERIAL SHOULD BE HARD BALSA)  
  8 PIECES 1/4" SQUARE X 36" BALSA STICK  
  6 PIECES 1/16" X 1/4" X 36" BALSA STICK  
  1 PIECE 1" SQUARE X 12" BALSA BLOCKS  
  NOTE: BALSA IS MEDIUM DENSITY UNLESS NOTED OTHERWISE
       
    PLYWOOD  
  1 PIECE 1/8" X 6" X 12" AIRCRAFT PLYWOOD  
    NOTE: USE 5 PLY IF AVAILABLE  
  1 PIECE 1/16" X 6" X 12" AIRCRAFT PLYWOOD  
       
    SPRUCE  
    Spruce spars in the sizes we required for the Hawk was difficult to find.  We located wholesale vendor in California and placed and order for the entire member / builders group at one time $4.50
  8 PIECES 1/16" X 1/4" X 36" SPRUCE STICK  
  2 PIECES 1/8" X 1/2" X 36" SPRUCE STICKS  
    NOTE: DO NOT SUBSTITUTE BASS WOOD FOR SPRUCE  
       
    BRASS TUBES  
    Tubes were purchased at the local Model Shop for approximately $4.00 per set of three $4.00
  1 PIECE 15/32" X 12" BRASS TUBE  
  1 PIECE 5/32" X 12" BRASS TUBE  
  1 PIECE 3/32" X 12" BRASS TUBE  
       
    ALUMINUM  WING JOINER ROD  
    In our particular case a stock length of 7/16 dia. 2024 aluminum wing rod was purchased and cut into pieces by one of our members. The cost was split and came to approximately $3.00 per plane.  The 7-degree bend was done in a press by one of our members.  
  1 PIECE 7/16" X 12" 2024-T3 ALUMINUM JOINER ROD  
    NOTE: ROD MUST BE BENT 7 DEGREES AT CENTER  
       
    STABILIZER BELL CRANK  
  1 EACH STABILIZER BELL CRANK SOURCE HI LAUNCH  
       
    LASER ARTS RIB SET  
    These items were custom fabricated in a run of 15 sets.    
  1 SET Laser cut ribs and shear webs  
       
    MISCELLANEOUS  
    NORMAL ITEMS SUCH AS GLUE, SANDPAPER, HINGES PUSHRODS, ETC. ARE NOT LISTED AND ARE AT THE BUILDERS CHOICE.  
       
    SOURCES  
    Carbon Fiber Spar Caps:  
         Aerospace Composite Products  
         357 Stealth Court  
         Livermore, CA 94551  
              Order Desk:  (800) 811-2009  
              Tech assistance: (925) 443-5900  
              Web: http:/www.acpsales.com  
       
    Balsa Wood & Plywood:  
         Lone Star Balsa  
         115 Industrial  
         Lancaster, TX 75134  
             Order: (800) 687-5555  
             Info:    (972) 218-9663  
             Fax:    (972) 218-9211  
             Web:   http://www.lonestar-models.com  
       
    Spruce Wing Spars:  
         Tower Hobbies  
         P.O. Box 9078  
         Champaign, IL 61826-9078  
            Ph: (800) 637-6050  
            Fax: (800) 637-7303  
            Web:  http://www.towerhobbies.com  
       
    Brass Tubes  
         Tower Hobbies  
         P.O. Box 9078  
         Champaign, IL 61826-9078  
            Ph: (800) 637-6050  
            Fax: (800) 637-7303  
            Web:  http://www.towerhobbies.com  
       
    Stabalizer Bell Crank & Alum. Joiner Rod  
         Don Richmond, Hi Launch  
         4415 Caminito Sana #4  
         San Diego, CA 92122  
             Ph:     (619) 988-1710  
             Fax:   (858) 587-6086  
             Web:  http://www.hilaunch.com  
       
    Laser Cut Rib and Shear Web Set  
      Laser Arts Custom Laser Cutting  
      Web: http://www.laserartco.com  

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