Trailer design - where are the clever guys - Page 4




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  1. #61
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    Default Re: Trailer design - where are the clever guys

    This has turned into a full-on design review - with calculations! Thanks for all the help guys!

    I must just make it clear that I am in concept phase and no detail is sorted out yet. I am taking all the advice into consideration.
    Overkill - isn't!

  2. #62
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    Default Re: Trailer design - where are the clever guys

    I said in the start of thread the A frame should be Channel. It is pointed out that the the rectangular 100x50x4 for the main frame is also a problem. Maybe you should change that to channel as well. The difference is only 1.1kg per meter.The problem is that side gate. If this was a dedicated cattle trailer the complete welded structure will make it strong. But you have a big bending moment right in front of the front shackle. Normal flatbeds are 250 or 300mm deep there. If you can move that gate behind the mudguard it will be a plus.Floor structure, you can seal the joints with a proper seam sealer. Den Braven Polyflex, or tectane, or Sikaflex. These products are paintable. Plan B is to leave a gap of 10mm between pans. But a big bull may bend it then. 2m is a long span.
    Kind Regards.
    Wikus Beetge.


    Discovery 3S TDV6 2007
    Hilux KZTE single cab 2001

  3. #63
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    Default Re: Trailer design - where are the clever guys

    Any thoughts on mounting the springs on the inside of the chassis instead of below it? It will further reduce deck height.
    Overkill - isn't!

  4. #64
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    Default Re: Trailer design - where are the clever guys

    Quote Originally Posted by Uys View Post
    Any thoughts on mounting the springs on the inside of the chassis instead of below it? It will further reduce deck height.
    Going Amarok! Same principle
    I'm not arguing, I'm just explaining why I'm right!

  5. #65
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    Default Re: Trailer design - where are the clever guys

    Quote Originally Posted by Uys View Post
    Any thoughts on mounting the springs on the inside of the chassis instead of below it? It will further reduce deck height.

    Drew it...... Crappy idea..... abort!
    Overkill - isn't!

  6. #66
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    Default Trailer design - where are the clever guys

    Quote Originally Posted by Uys View Post
    Drew it...... Crappy idea..... abort!
    Not so crappy look at the way they are done on trucks.

    Easier to brace for side flex spreading the chassis load from the spring pack mounting points over a greater area.
    Last edited by MickPrado; 2018/07/05 at 09:58 PM.

  7. #67
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    Default Re: Trailer design - where are the clever guys

    Yes, but trucks has pressed steel chassis. Not straight channel chassis.
    Overkill - isn't!

  8. #68
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    Default Re: Trailer design - where are the clever guys

    The drawings has been sent to my manufacturer. It will be painted Cruiser Khaki - that should add another 50 GPa to the Young's module of the material.

    Full Channel frame - C100x 50 taper flange


    Click image for larger version. 

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    Section through the model showing the deck plates. 2mm gap between the plates which I may fill with silicon or may not....

    Click image for larger version. 

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    Stiffening where the a-Frame meets the loadframe

    Click image for larger version. 

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    Suspension mounting cradle and balance beam:
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    CoG:
    Click image for larger version. 

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    Overkill - isn't!

  9. #69
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    Default Re: Trailer design - where are the clever guys

    Quote Originally Posted by Uys View Post
    The drawings has been sent to my manufacturer. It will be painted Cruiser Khaki - that should add another 50 GPa to the Young's module of the material.

    Full Channel frame - C100x 50 taper flange


    Click image for larger version. 

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    Suspension mounting cradle and balance beam:


    CoG:
    Hi Uys

    What contribution do you envisage those haunches as having?

  10. #70
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    Default Re: Trailer design - where are the clever guys

    Quote Originally Posted by Learnercamper View Post
    Hi Uys

    What contribution do you envisage those haunches as having?

    hmmm..... had to read that 4 times.


    I asked myself the same question and arrived to the conclusion that if they don't do much, at least I like it.
    Overkill - isn't!

  11. #71
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    Default Re: Trailer design - where are the clever guys

    Quote Originally Posted by Uys View Post
    hmmm..... had to read that 4 times.


    I asked myself the same question and arrived to the conclusion that if they don't do much, at least I like it.

    Looks really good, nice drawings!

  12. #72
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    Default Re: Trailer design - where are the clever guys

    Thank you!
    Overkill - isn't!

  13. #73
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    Default Re: Trailer design - where are the clever guys

    And so it begins.

    I got some quotes to have it build and soon realized that this is not an economical option.

    So Kiepie here will have to get his hand dirty.

    The first components are ordered an in process. I am keeping a cost sheet which I'll update as the build goes along.

    Here is where we are now:

    Click image for larger version. 

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    Overkill - isn't!

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