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building some top bows TECH

Discussion in 'The Hokey Ass Message Board' started by bct, Feb 24, 2008.

  1. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    THE ATTACHED PICS ARE IN THE LAST FEW POSTS


    The bows that came with my kit are for a 32...seems as if its happened b4...i looked at model A ones but i didn't like the hight and "buggy" look much so i thought i'd build my own...started buy building the header as per w/s..and then masked out a rough shape for reference after squaring it up...even made a lil window
    [​IMG]
    [​IMG]
    made a form out of MDF
    [​IMG]
    got some 1.5 " oak and ripped up some 1/8 strips
    [​IMG]

    [​IMG]
    buddy who builds canoes lent me his steamer
    [​IMG]
    stacked em up paying attn to the grain and then clamped them up
    [​IMG]
    [​IMG]
    next step after will be to laminate the strips over the form w/wood glue
    the steam lets the fiber bend w/o cracks ... allowing a tight radius for a lower top :D
     
    Last edited: Sep 27, 2015
  2. Flipper
    Joined: May 10, 2003
    Posts: 3,395

    Flipper
    Member
    from Kentucky

    Damn, bending wood like that looks like fun.

    Post up some of the details of the "steamer". How does it work? What is the technique for using it? (is it instantaneous or do you steam for hours/days?)
     
  3. damn I did mine with 1/8 oak strips. glued and clamped them one strip at a time. I like yours better
     
  4. Mercmad
    Joined: Mar 21, 2007
    Posts: 1,383

    Mercmad
    BANNED
    from Brisvegas

    I've done this with Ash framing for car bodies,I just got a steel pipe and heated the end with a gas burner ring. As long as it was sealed to keep the steam in it worked fine.
    I learnt how to do it from my Dad who used to repair broken ribs in his wooden boats all the time.
    Check out some traditional boat building forums for a few good ideas on how it's done.
     

  5. Mercmad
    Joined: Mar 21, 2007
    Posts: 1,383

    Mercmad
    BANNED
    from Brisvegas

    Not a bad profile but i would have had touch more slope in the back panel .
    Are you going to put a "gypsy" in the back panel?
     
  6. Canadians,first learn how to use steam to bend wood,when we learn how to curve the blades on our hockey sticks! LOL ;) Great post, i've thought of building top bows and a top,to turn my coach into an A-400 style body. Thanks for the info.
     
  7. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member


    i decided to do them in two steps , could be done with steaming a solid piece like henry did OR cold laminating the strips

    when i tried the bend cold, the thin strips wanted to crack. the solid pieces that came with my ebay purchase had unsprung (even though they are the wrong size)

    i decided on a combination of the two styles
     
  8. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    this set up is a simple pipe w/end caps modified to accept a rad hose and hooked up to a 20 gallon barell w/a nipple (hehehe)

    its simple and could be done with anything that would hold/produce steam...no need to say don't let it pressurize

    the steam only needs to contact the oak for an hour or so, because it is only 1/8 thick. if it was the 1"+ that henry used then probably 2-3 hrs..
     
  9. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    i forgot to mention in the post above that the 20g barrel had a 3/16 plate welded to the bottom to save it from the fire...

    here is how i stored em

    [​IMG]

    glued

    [​IMG]
     
  10. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    cleaned up the edges with the table saw
    ....both sides
    [​IMG]
    check to see if it is straight
    [​IMG]
    mark a centerline for the taper and a guide for screw holes later
    [​IMG]
    lay out a taper and cut it on the bandsaw or jointer
    [​IMG]
    radius the corners
    [​IMG]
    mounted
    [​IMG]
    [​IMG]
    both bows on...
    almost done ,i think i'm gonna make a thicker header
    [​IMG]
     
  11. Royalshifter
    Joined: May 29, 2005
    Posts: 15,582

    Royalshifter
    Moderator
    from California

    Dammm that is cool......You and Dreadman and the rest of you wood working guys just amaze me....thank you.
     
  12. sawzall
    Joined: Jul 15, 2002
    Posts: 4,724

    sawzall
    Member

  13. 6 Strings
    Joined: Feb 28, 2008
    Posts: 8

    6 Strings
    Member
    from Austin TX

  14. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    thanks guys but after contemplating i decided that it wasn't low enough...i cut 1.5 " from the bottom of the legs
    [​IMG]

    2" chop from store +1.5" off the legs and 3" saved with the custom bows...totals 6.5 inches
    [​IMG]

    i am happy with the look now and just need to finish them withn spar varnish and send it to jack for skin :D

    jack turned out to be an asshole so i built the skin myself.....if you need these pics feel free to email me and i'll send em to you direct....
     
    Last edited: Mar 2, 2010
  15. McFly
    Joined: Oct 10, 2001
    Posts: 1,169

    McFly
    Member

    Bumping this so bct can put the pics back in.

    On your roadster top, I believe you used 30/31 top irons on your 28/29 roadster. Correct? If so, can you explain to me your method in making the wooden bows fit? I already figured out the header, that was easy. I have a few ideas kicking around on how to do the 2 bows. I'm just wondering what you did and if you have any pics of them or the process.
     
  16. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    the pics i have in no particular order, thanks for lookin
     

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  17. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    still getting used to attachin'
     

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  18. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    there are a few more to come
     

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  19. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    its raining and the satelight is slow..
     

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  20. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    two more ...only works two at a time for me
     

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  21. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    the only thing i would have done different now is put more curve in the second (middle) bow ....when you tip it forward it loses some curve...thats the last of the pics i have . i hope they help.
     

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    Last edited: Jan 17, 2011
  22. bct
    Joined: Apr 4, 2005
    Posts: 3,154

    bct
    Member

    car003.jpg

    Never did post a finished pic
     

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