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Thread: Built from scratch: 250R

  1. #76
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    Quote Originally Posted by Billy Golightly View Post
    Wow, great project and custom at every corner and detail, awesome work!!

    Love the pipe work also, been down that road myself, they are a pain in the ass to build but once its done and you look at it, its a damn good feeling!
    Thank you very much, how did you calculate the cones? Did you draw them with cone layout?

  2. #77
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    Some axles after chemical nickel coating,

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    The Chainwheel was painted red like every detail on the trike:

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  3. #78
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    A small walkaround the trike with mounted axle and wheels:

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  4. #79
    Billy Golightly's Avatar
    Billy Golightly is offline Always finding new and exciting ways to not give a hoot in hell Catch me if you can
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    Quote Originally Posted by sticker_sääp View Post
    Thank you very much, how did you calculate the cones? Did you draw them with cone layout?
    Yes. I used the 2 Stroke Pipe Wizard program (About $25 dollars) and cone layout. What took me FOREVER to understand was how to create each individual section in cone layout. Essentially, all it is, is figuring out the width (or length, as traveling down the pipe) of the section you want on average, and then dividing that into the length of the specific coned area you are dividing. Then you increase the inlet and outlet diameters of each one of those sections, that much. Its VERY easy once you understand the process, but I banged my head against the wall for weeks trying to speak to mathematicians and all sorts of people to figure out how to equally divide the cone chapes, and what the inlet and outlet diameters for each one of those sections would wind up being so I could plug the parameters into cone layout.

    When I did mine, I actually created templates for each individual section of the pipe, versus making the entire thing straight and then band sawing pie cuts out of it which seems to be the more popular methodology. I had 54 pieces laser cut for me by German buddy Hagen, and then I hand rolled and tig welded everything together, each bend and section individually.

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  5. #80
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    Quote Originally Posted by Billy Golightly View Post
    Yes. I used the 2 Stroke Pipe Wizard program (About $25 dollars) and cone layout. What took me FOREVER to understand was how to create each individual section in cone layout. Essentially, all it is, is figuring out the width (or length, as traveling down the pipe) of the section you want on average, and then dividing that into the length of the specific coned area you are dividing. Then you increase the inlet and outlet diameters of each one of those sections, that much. Its VERY easy once you understand the process, but I banged my head against the wall for weeks trying to speak to mathematicians and all sorts of people to figure out how to equally divide the cone chapes, and what the inlet and outlet diameters for each one of those sections would wind up being so I could plug the parameters into cone layout.

    When I did mine, I actually created templates for each individual section of the pipe, versus making the entire thing straight and then band sawing pie cuts out of it which seems to be the more popular methodology. I had 54 pieces laser cut for me by German buddy Hagen, and then I hand rolled and tig welded everything together, each bend and section individually.
    Thanks for sharing. You used a lot more sections then me. For my next pipe i will also built at least 40 sections. I think i used a complete new method by designing that thing in CAD. It is basicaly the "saw a straight pipe" method but it was entirely done on the pc. It was also quite puzzeling till i found a solution to devide the angles between every segment. Now this is done within an houre when the "3D scan" of the route through the trike is finished.

    Did you polish the welded lines on the insied? On the pic it looks like you just welded it together. When i did that i had a lot of weld spatters on the inside...

  6. #81
    Billy Golightly's Avatar
    Billy Golightly is offline Always finding new and exciting ways to not give a hoot in hell Catch me if you can
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    Mine were all fairly clean on the inside. I did have a few a little rough but overall I was happy with it. As you mentioned, for me also, the challenge was dividing the angles for each section and knowing with exactness what their dimensions were. On the smaller diameter areas I didn't do more than a 5 degree angle on each end. On the larger pieces I went up to 15 I think, in the middle.

    I really like your cad method - it is a little beyond my realm of expertise but I can definitely appreciate the modeling process and work it took to put that together in that way. Here is one more picture of mine finished as well as a link to my build thread and then you can have your thread back from me

    http://www.3wheelerworld.com/showthr...ighlight=rotax

    Sent from my SM-N910V using Tapatalk
    Last edited by Billy Golightly; 09-08-2015 at 11:06 PM.

  7. #82
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    Quote Originally Posted by Billy Golightly View Post
    Mine were all fairly clean on the inside. I did have a few a little rough but overall I was happy with it. As you mentioned, for me also, the challenge was dividing the angles for each section and knowing with exactness what their dimensions were. On the smaller diameter areas I didn't do more than a 5 degree angle on each end. On the larger pieces I went up to 15 I think, in the middle.

    I really like your cad method - it is a little beyond my realm of expertise but I can definitely appreciate the modeling process and work it took to put that together in that way. Here is one more picture of mine finished as well as a link to my build thread and then you can have your thread back from me

    http://www.3wheelerworld.com/showthr...ighlight=rotax

    Sent from my SM-N910V using Tapatalk
    Great built from you, that trike looks awesome.

    Dont worry about the threat, i realy like to corespond with someone who is gone that way too...

    What steel and plate thicknes did you use?

  8. #83
    Billy Golightly's Avatar
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    I had two sets of everything made. One in mild steel, 1mm thick that I built this pipe out of. And then another set out of stainless steel that had been annealed for easier forming/shaping.

    I have not done anything with the stainless sets yet.

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  9. #84
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    Aug 2015
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    That's some patience you have there.

  10. #85
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    Germany, Bavaria
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    Sorry for the delay of my upgrades... I am quit buisy with the building of my flat at the moment...

    A pic from the zinc plated steel parts:
    (They are not only for my trike)

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  11. #86
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    The Carb and cooling hose was mounted:
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  12. #87
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    Aug 2015
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    Germany, Bavaria
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    The guards (I dont know how you guys call them!?) for my radiators were built from anodized aluminum sheets and aluminum pipes.

    They hold the shrouds an protect the radiator from dirt:

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    after welding and cleaning:
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    finished:

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  13. #88
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    Quote Originally Posted by jamve View Post
    That's some patience you have there.
    Yes the whole built used to take about one year and three months...

  14. #89
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    Germany, Bavaria
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    Sorry for letting you wait, i had to built an stainless exhaust for my 200es, attached is a pic as excuse

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    A steel kickstarter was milled for the trike but then i found out that it will not clean my pipe and i had to think about a better concept for the kicker...


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    (thats the part of the tricke that i am not realy proud of...)

    Here is my solution, it is a bent steelrod wich was welded to the cut lower pice of the milled kicker...

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  15. #90
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    First test of the engine...

    https://goo.gl/photos/mYbbLjio5VQbDfJv7

    And the first test ride...

    https://goo.gl/photos/Ri1hUd2oikothCiv6

    And here you can se a beautiful pic of my technical drawing skills:

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