The PAA sand wagon.

Discussion in 'Computer Aided Modelling' started by Andy_Sollis, Sep 21, 2018.

  1. Andy_Sollis

    Andy_Sollis Full Member

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    This was my first project 5 years ago. The PAA sand hopper wagon. At that point it was guess work, having never even seen one for real, only in photos.

    So, when I discovered 123D design (now obsolete) I began the drawing... the real wagons are very similar (and based on) the more common PGA wagon and built by WH Davis and Standard Wagon in the 1980’s.

    For the last few months I’ve had access to one, so thought it time to update my rather inaccurate model with some new design.

    Here are a few shots of the original and then my art work for the 3D printed “hopper top” to fit to a modified PGA by Hornby. There is still a little compromise, but it gives the overall impression.

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    In the WBB Minerals livery at Cheddleton. The top doors are air operated.

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    Being cleaned up.

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    New ends for the Hornby model

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    New handbrake wheel

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    Measuring the arms

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    Locking mechanism

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    Arm work

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    Ram details

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    Fitting the new ends

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    Drawing up the wagon for fitment (or replicating the Hornby model.)

    Andy
    NB3DM
     
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  2. Andy_Sollis

    Andy_Sollis Full Member

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    Creating new arm and rams for the top doors.

    B135D164-1D9C-43CF-A451-AB51B4210A40.jpeg
    Nearly done. 4 hrs just for the blue parts.
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    Designed to show fitment.

    Andy
     
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  3. York Paul

    York Paul Full Member

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    Nice work Andy, I remember these running down the valley in rakes of 15 hauled by a pair of Twenties or a 47, in fact 47 532 was a regular on the sand run and also on Ten Trip to Cauldon.
     
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  4. Andy_Sollis

    Andy_Sollis Full Member

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    Well, that’s one of my ideas, but as they were so little modified, with just a change of livery, you can go from build to 2018 and work behind 58,60& 66 for modern day on the Middleton towers trains. Maybe even a 56?

    Next up will be the single door roof of which there are non left, so it’s a bit of guess work from what I have

    Andy
     
  5. Andy_Sollis

    Andy_Sollis Full Member

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    So, it would seem that I have come as far as I can in 123D with this model (short of designing the underframe and wheel sets, but the idea was only so I could create parts to fit the Hornby PGA wagon... and at the moment, the cost would far exceed the price of a wagon new!

    But, finally it’s done. In the closed position....
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    And the open door position....

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    It’s still not 100% accurate, some of it has to be adjusted to meet minimum printing thicknesses, but I have to say I’m very happy with this.

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