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(MBBO#05 Class 2) Flashback GT - Done!

Discussion in 'MBBO 2016 BIKES' started by tjwilson, Sep 7, 2016.

  1. tjwilson

    tjwilson Pro Member

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    image.jpeg

    Partridge Family, Brady Bunch. Jan or Marsha, Beetles or Monkees? Monkeemobile, Munster Koach. Dean Jeffries, George Barris, "Big Daddy" Roth. "Capt. Pepi's Motorcycle and Zeppelin Repair". MPC, AMT, Revell. Testors (the one that actually worked, not the one that smelled like oranges). Riding late into long warm summer nights. Street lights don't come on till ten. Who's house do we meet at tomorrow? Schwinn Stingray Fastback.
     
    G-Matt, furyus, SwissGuy and 6 others like this.
  2. tjwilson

    tjwilson Pro Member

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    image.jpeg

    Been thinking about this design for a while. Started out with rough thumbnail sketches that were tightened up into a dimensioned drawing. From there I created rough 3D images in SketchUp. Made adjustments in SketchUp and then tweaked the line drawing.
     
    Last edited: Sep 9, 2016
  3. tjwilson

    tjwilson Pro Member

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    Here's a few of the 3D images. Things will change once I start cutting and bending metal but, this is the general direction. Haven't decided on colors yet.

    image.jpeg

    image.jpeg

    image.jpeg
     
  4. tjwilson

    tjwilson Pro Member

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    Rims are ACS Stealth three spokes rescued from the trash. I've had them for about five years waiting for the right project. Tires are 20 x 2.4 Odyssey Hawk and 20 x 1.5 Kenda Kwest.

    image.jpeg
     
  5. tjwilson

    tjwilson Pro Member

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    Pieces and parts. Should be able to dive into the metal work in a week or so!

    image.jpeg
     
  6. CRASH

    CRASH

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    However you do in the voting, you certainly win the planning/design vote from me! 3D rendition? Whoa!!
     
  7. Falstaff

    Falstaff

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    Interesting
     
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  8. OneHorsePower

    OneHorsePower

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    Cool plan ! i hope you can pull it off , it will be awesome :rockout:
     
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  9. RustyGold

    RustyGold

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    Wow...outstanding design, love it!

    Jason
     
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  10. Chad T

    Chad T

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    Love the wheel/tire combo. Looks like you've got a great plan.
     
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  11. LukeTheJoker

    LukeTheJoker Moderator

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    Wow! Been waiting for this since you dropped that first photo in the ideas thread, I love it!

    Luke.
     
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  12. johnp.smith

    johnp.smith

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    Wow. Im following. I cant believesome of the frame designs Ive seen on this site. Im rooting for this one
     
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  13. The Renaissance Man

    The Renaissance Man __CERTIFIED DIVER__ (Open Water & Open Dumpster) Pro Member

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    Beautiful design!
    My one concern would be the strength of the tubing holding your weight on the seat with out the advantage of full triangulation. I do see a small triangle under the front of the seat and hopefully it will suffice.
     
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  14. tjwilson

    tjwilson Pro Member

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    Thanks! I suspect I'm not the only one doing this much/type of prep. Just showing my cards early in the game ;)
     
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  15. tjwilson

    tjwilson Pro Member

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    Thanks! Strength in the seating area is a concern for sure. I plan to run the top bar close to the back end of the seat. Then connect that to the sides creating a triangular truss where most weight/stress will be in the seating area. Suppose the first wheelie will reveal the wisdom of that design choice!
     
  16. tjwilson

    tjwilson Pro Member

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    Just one last fluff image before getting to something of substance (and bike build related). Earlier this week I got back from a two week road trip of the American Southwest. Saw the most amazing rainbow at Arches National Park.

    archesNP.jpg

    And so, ahem, speaking of arches...
     
  17. tjwilson

    tjwilson Pro Member

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    Started bending up the main tubes for the frame backbone. Hard to see in the images but, I printed out and spliced together a sideview drawing at actual size to use as a guide.

    bends01.jpg

    bends02.jpg

    bends03.jpg
     
  18. tjwilson

    tjwilson Pro Member

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    So this is probably the most ridiculous reuse of a headtube, ever! The headtube is from what remained after previous projects of a Schwinn Suburban. The thought was to cut off the twin downtubes leaving short ends attached to the headtube. These ends would then be ground down so the new top and down tubes could slip over them, strengthening the joint. Ended up not being enough material on the short ends for this to work. I've cut those completely off and am in the process of adding short tubes that the top and down tubes will now slip over. Would have been easier to start with a tube that had the same ID and OD as the headtube. But hey, I did save myself from having to drill and tap two small holes for a headbadge that I haven't decided yet if I'm going to use. ;)

    headtube01.jpg

    headtube02.jpg

    headtube03.jpg

    headtube04.jpg

    headtube05.jpg

    Hopefully this will be a productive weekend and I'll have more to post soon.
     
  19. LukeTheJoker

    LukeTheJoker Moderator

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    Glad this one has started, been looking forward to it!

    Luke.
     
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  20. Falstaff

    Falstaff

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    I've been to arches, and all over this beauty we call America.....That's a once in a lifetime scene, let alone getting a shot of it.
     
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