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ARC Hanson JHA Part 4: Revised 3D Model

lyneux

Entry posted by lyneux

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I've been working again on the 3D model and refining it to the next version ready to print:

 

gallery_7525_1803_98975.jpg

 

Refinements include:

  1. Revised secondary dampers (shown in blue) with extra strengthening (these broke in the first test prints). These also now have their own sprue (shown in green) to try and stop them breaking off during the printing and cleaning process. Spare dampers are also included in case of breakages.
  2. New mechanism for inserting the wheelsets. With two Markits brass bushes positioned flanges to the middle on the axle, the axle can be inserted from below. Bushes are then pushed outwards. The missing piece of the bearing housing has also been included so it can be glued in place after the wheels are fitted. These pieces are printed on the spacing sprue between the frames (you can't see the sprue in this view but it's there!). Again, I've included two spares in case of damage or loss.
  3. Extra bracing to add strength to the side sub-frames

Note: all sprue elements shown in green and included to try and minimise warping during printing. These are easily cut off from the final print.

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jonhall

Great work - I like your method for getting the wheels in.

 

I wonder if the contact area where the bogie is pivoted, might be a bit small? You could find the wagons on top will tend to wobble with such a small area?

 

Jon

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Jim Martin

I only found your blog a couple of days ago, but I love what you're doing. My plans include a set of JMAs in N gauge, so I'm fascinated to see how you're going about designing these bogies. Brilliant work!

 

Jim

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lyneux

Thanks gents!

 

Jon - No wobbling with the one wagon that I've done so far. Remarkably stable.

 

Just broke my airbrush nozzle so painting has come to a standstill. Working on the (custom) transfers until the new one arrives.

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lyneux

Hi Chris,

 

I've just received the fox transfers but I'm really not impressed! Not only are they fuzzy but there are some completely fictitious items included on it that have never appeared on the ARC JHAs (they look like they came from the PGAs).

 

I also hate the way that they provide individual numbers rather than pre-numbered data panels (I'm not that bothered whether I am modelling e.g. wagon 19813 or 19814. Given the cost of them (£15 for 3 wagons worth) and all the issues outlined above, I prefer to do my own.

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scouser

Hello, just found this blog and am really impressed. Are you planning to make these bogies available for sale and if you are do you have a rough costing for them?

I know someone who would love to buy some, hint hint!

Paul

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