Advertise on Bikeforums.net



User Tag List

Page 1 of 3 123 LastLast
Results 1 to 25 of 60
  1. #1
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)

    Bamboo question..

    I've got some very nice large diameter bamboo, was already fairly well aged, I am however heat treating it to get some final shrinkage/darker coloring, rather then going with the torch I'm using the oven method, from everything I've read/seen I would have thought they'd only need one cooking, I have a brown but it's nowhere near as dark as anyone elses I've seen, I'm suspecting it's because I didn't scorch the outside and let it all caramalize at once instead of heating the outside to get the inside, opinions please on if it needs a second round in the oven?
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  2. #2
    Senior Member
    Join Date
    Jun 2011
    Posts
    363
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't know, structurally - but it sounds very tasty!

    KeS

  3. #3
    Senior Member fixedgear80's Avatar
    Join Date
    Jul 2010
    Location
    Portland Or
    My Bikes
    80"s Raleigh Comp 48X18
    Posts
    432
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Photos plz. If you have baked your tubes once and still want the tubes to get darker... try using a wood stain/finish on the tubes. I'm not a builder but i want to say that burning and baking is prob not a good thing. Stick with the oven method.
    Quote Originally Posted by TejanoTrackie View Post
    Toe clips and straps are a fashion statement for 99.9996 % of the cycling population.
    1981 Raleigh Comp G.S. Conversion
    [SIGPIC][/SIGPIC]
    Racking up the miles!

  4. #4
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    pics tomorrow, and I already plan to sand then stain/then coat with epoxy or something similar, going for a black but natural grain bamboo look.
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  5. #5
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    the propane hand torch darkend my bamboo much more than the oven heat treatment did.

  6. #6
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by cbchess View Post
    the propane hand torch darkend my bamboo much more than the oven heat treatment did.
    I'm sure it did, I think I'm happy with the baking results though. I'm curious how you weight tested your bamboo after baking or if you did?, I'm using sawhorses and bodyweight/force myself...
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  7. #7
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I heat treated most of my smaller tubes in the oven. I had mostly pre-cut these to be Chainstays and Seatstays. The bigger tubes for the main triangle I cured with the hand torch. After the heat curing I put all the bamboo in my bamboo drying house for 4 months or so (my sons tree house). So as for a strength test comparison of torch to oven, it would be an apples to oranges test. They all seem WAY stronger than the green fresh cut stuff. I just built my table jig this weekend and glued my seat post steel insert into the top of my seat tube.

  8. #8
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Ahh okay, very cool but I think I got lucky I found a bamboo wholesale supplier here, who was kind enough to let me into his dried bamboo shed, I'm basically heating for final shrinkage and that's about it! 4 months huh? I see everywhere people only say 3, but I'm thinking your probably on the right track. Oh and I'm doing approximate cuts ahead of time 1-2 inches larger then what I'll final need, I know it's a bit overkill but the dremmel can handle it.
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  9. #9
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    much better to have them too long then you can decide which end to trim to have the best tube.

  10. #10
    Senior Member fixedgear80's Avatar
    Join Date
    Jul 2010
    Location
    Portland Or
    My Bikes
    80"s Raleigh Comp 48X18
    Posts
    432
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    cbchess
    you should really post pics of your progress! You would be the first one here to do so with a bamboo bicycle!
    I'm sure im not the only one that is interested!!!
    Quote Originally Posted by TejanoTrackie View Post
    Toe clips and straps are a fashion statement for 99.9996 % of the cycling population.
    1981 Raleigh Comp G.S. Conversion
    [SIGPIC][/SIGPIC]
    Racking up the miles!

  11. #11
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by fixedgear80 View Post
    cbchess
    you should really post pics of your progress! You would be the first one here to do so with a bamboo bicycle!
    I'm sure im not the only one that is interested!!!
    You would be incorrect sir http://www.bikeforums.net/showthread...+bicycle+build enjoy.
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  12. #12
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I need to take some pictures so I can post them.

  13. #13
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    yes you do, and I guess I do too.
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  14. #14
    Senior Member fixedgear80's Avatar
    Join Date
    Jul 2010
    Location
    Portland Or
    My Bikes
    80"s Raleigh Comp 48X18
    Posts
    432
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    SweetNess!!! Thanks
    Quote Originally Posted by TejanoTrackie View Post
    Toe clips and straps are a fashion statement for 99.9996 % of the cycling population.
    1981 Raleigh Comp G.S. Conversion
    [SIGPIC][/SIGPIC]
    Racking up the miles!

  15. #15
    Junior Member
    Join Date
    May 2011
    Location
    Cocoa, Florida
    My Bikes
    Giant ATX 1.75, Ares Ashura, bamboo cruiser
    Posts
    11
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Raleighsport,

    IMO--Useing a torch is only good on green bamboo. If it's too dry to start or if you singe a spot you will hear a light crackle sound and the tube will have a weak spot. By combing the bamboo with the torch longitudenally, you break the cell walls with pressurized steam which allows the whole piece to dry faster than if you just put it away. The oven does not do this, but it will carmelize the sugars making a more flexabile, harder to split culm. If it's pretty dry to begin with I would be afraid of splitting it by heating it, especially if it's never been heated. The darker color of torched bamboo is partially the carbon on the surface and the depth/darkness is related to how long heat is applied. Mine start green and I torch to a dark chocolate chocolate/coffee brown, when I'm ready to bond (after mitering) I sand the whole thing down with a DA at 220 grit until the "outer brown layer" is gone. I wipe with a tack rag, then I bond; that way there is less hand sanding later and the surface is more absorbent of epoxy. If left in the dark brown state the epoxy will peel right off (which is due to the natural surface wax the plant produces). Here's a few finished shots. 1. my second cruiser 2. composite Direct Mount spacing 3. Mtb frame 4. Road frame seatstay yoke/bridge.

    C2 Built small.jpgM1 Tight Spaces.jpgFrame M1 small.jpgR1 Seatstay Yoke and Bridge small.jpg

    Andy

  16. #16
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Andy that bike is gorgeous man gorgeous and so are the other shots! And thank you, you pretty much confirmed everything I was pretty sure of from experimenting. I have some gorgeous baked bamboo now, but I don't plan to use that on my bike (the baking increased the rigidity but, because of the dryness also made it more brittle BIG FLAW) I'm going to go back to the same place though, and select some more predried bamboo and this time just cut/sand/miter. Well not that simple, but stainingoutside then sealing then epoxy and inner foam is kinda my plan.
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  17. #17
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Make sure you rough up the ends with a coarse file or hand saw to give the bamboo some extra tooth for bonding. I forgot to mention you need to pierce the culm inside the tubes before hand torch curing, or baking or the gas will expand and pop your bamboo.
    Last edited by cbchess; 09-21-11 at 12:12 PM.

  18. #18
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    a few pictures

    I tacked together my rear triangle this weekend. you can see you full sized layout and the jig I built right on top of it.


    rear frame in jig w flash by cbchess, on Flickr

    Here is a close up of the seat tube and seat stay joint

    seatstay seat tube joint by cbchess, on Flickr


    here you can see the steel seat tube insert. I cut the slot myself.

    seat tube by cbchess, on Flickr
    Last edited by cbchess; 07-25-11 at 08:37 AM. Reason: more pictures!

  19. #19
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    a few more pictures

    here are a few more:
    close up of the dropouts - just tacked in place. These will get full carbon wraps out to the blue tape.

    rear dropout close up by cbchess, on Flickr

    Chainstays tacked in place - I mixed sawdust into my epoxy to create a super sturdy filler and joint. This need a bit of shaping before the carbon fiber wrap.


    chainstays close up by cbchess, on Flickr

    BB joint close up. My donor frames were a Surly cross check and a bianchi. Both steel.

    bb close up by cbchess, on Flickr



    Here is a frame builders question.
    My chainstays are centered but my seat stays are not, due to a deeper miter cut on the overlap joint on the drive side. will this mess any thing up? it is about 1/4 to 1/2" closer on the driveside.
    Last edited by cbchess; 07-25-11 at 08:31 AM. Reason: spelling

  20. #20
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    last pictures

    full jig view:

    full jig view 2 by cbchess, on Flickr

    head tube waiting for top tube and down tube.

    full jig view by cbchess, on Flickr
    Last edited by cbchess; 07-25-11 at 08:30 AM.

  21. #21
    Senior Member
    Join Date
    Dec 2005
    Posts
    7,819
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    good

  22. #22
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My wife named my new bike the Ginsu Glider.

  23. #23
    Warning:Annoying to jerks RaleighSport's Avatar
    Join Date
    Jun 2011
    Location
    STS
    My Bikes
    Leader 725, Centurion Turbo, Raleigh Team Technium, Schwinn Premis, GT Tequesta, Bridgestone CB-2
    Posts
    5,816
    Mentioned
    28 Post(s)
    Tagged
    0 Thread(s)
    Love it! and I really don't know about your question...
    “Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.”


    ― Ralph Waldo Emerson, Emerson in His Journals

  24. #24
    Administrator Allen's Avatar
    Join Date
    Sep 2005
    Location
    Atomic batteries to power; turbines to speed
    My Bikes
    Salsa La Raza, Panasonic Electric, Bria, Bamboo touring, Bamboo cargo
    Posts
    4,707
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    http://www.powerfibers.com/PowerFibers_Issue_44.pdf
    ^^^
    One of my other loves are bamboo fly rods. Found a good article in a bamboo fly rod makers trade rag on building a bamboo bike frame.
    I go with a different approach with the bottom bracket but it's a good example of a construction process.

  25. #25
    Map maker cbchess's Avatar
    Join Date
    Feb 2008
    Location
    Richmond,VA
    My Bikes
    Ventana El Ciclon, Walt Works 29er, Specialized Enduro (fixed up for my son).
    Posts
    728
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    great link! the 18 piece bamboo fly rod was impressive.

Page 1 of 3 123 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •