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A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Tue Mar 28, 2017 3:12 am
by PeterH
I've decided to go to 24 mm gauge track, because I want to model wagons you can stand up in, and the proportions never look right with 16.5 mm gauge. Scale is about 1:25. I like this scale because I can convert from real to model dimensions in my head. And I can see the parts.

I'm making a goods van, based on a Decauville 60 cm gauge prototype, but in the New Zealand idiom. Prototype wagons here were often in this idiom, because it was cheaper and faster to copy something in the workshop rather than buy it from overseas.

I'm using wood strips cut from plywood veneer. I wet the plywood until the glue comes apart.

Here's my jig for making the ends:

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And here's an end glued up in the jig:

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Cheers

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Thu Mar 30, 2017 12:32 am
by PeterH
I've made two ends, two doors and four part sides. Now glued together to make this:

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The bling is thin card and the 'nuts' are brass lacemaking pins. I find the pinheads look more real than other representations that should look more real. I've modelled the kind of door where the mechanism is hidden by a strip of galvanised steel - I'm nothing if not pragmatic.

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Thu Mar 30, 2017 7:41 am
by Bilco
Your van is looking very good, Peter. I look forward to watching it develop!

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Thu Mar 30, 2017 5:48 pm
by chris69
Love you VAN, excellent work! Can you give us some of the Model Dimensions? would be great
Thanks
Chris

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Thu Mar 30, 2017 8:35 pm
by PeterH
Chris: the van is 140 mm long, 70 wide and 85 high. That's 5 1/2 inches by 2 1/2 by 3 1/2.

I like how it feels in my hand and it reminds me of the feel of the goods van in my Hornby clockwork model railway set. I got this set when I was 5 years old and my hand was much smaller then, so I assume the Hornby goods van was smaller too.

Before making this I started making the same van body in 1:35 scale, but it was a bit fiddly to glue together and apply the details. And it didn't feel so good in my hand.

My old Hornby clockwork set was 0 scale I think, around 1:48 scale. The wagons and locomotives were all 2 axle, so it actually represented what I would now call a small industrial railway. Within a few years of getting it I was seduced into changing this for a Hornby dublo set, around 1:75 scale. This was electric and the models were mainline - complex locomotives and coaches with bogies. These didn't hold my interest the same. And now, many years later, I'm back modelling small industrial railways.

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Sat Apr 01, 2017 2:44 am
by PeterH
For the underneath, this is a spring, or should I say 'spring', because it's glued up solid. There are 5 leaves, each 2 layers of 160 gm card and all folded up concertina fashion along the edges, so that each leaf has a fold on the outside. Which makes each leaf look separate, with a groove between. All of which might disappear during painting.

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Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Sun Apr 02, 2017 6:11 am
by chris69
Thanks for the dimensions, gave me some ideas.
looking forward to your progress.
Best
Chris

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Sun Apr 02, 2017 11:46 pm
by PeterH
This came together easier than I expected. The axleboxes are chunks of wood covered with thin card. Wagons like this tend not to have W-irons, but a simple chunk of metal tapered at the lower end.

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There's some sheet lead for weight held between the plywood floor and the chunk of wood below in the photo. I've just guessed the weight - does anyone have any experience with how much a wagon like this should weigh?

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Wed Apr 05, 2017 12:26 am
by PeterH
Rolling... I had trouble getting wagon-like wheels the right size - about 20 mm diameter. These are designed for modelling a New Zealand prototype electric locomotive in a much smaller scale.

The black strip joining the wheelsets is a length of steel strapping, used to tie up bundles of timber. It's slightly springy. It is screwed to the wagon floor with a spacer between the floor and the black strip. The spacer is about a third the length of the spring, so each wheelset is cantilevered out on the strip. This provides simple springing for the wheels.

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Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Sun Apr 09, 2017 10:28 pm
by PeterH
Almost done. I'm happy to have got this far and I will take a break while I figure out couplings and weathering.

The roof is individual boards, with most of the gaps filled with the crack filler I use on my house, then tissue paper. The texture is a bit fine at this scale. The roof is on a sub frame, so I can remove it.
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And this is my first wagon that has brakes. The bits are 0.8 mm ply, most two laminations. This is just strong enough, but looks a bit coarse, so next time I'll use brass strip.
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It has the look of a Decauville wagon underneath - wheels look too small. I guess this is for the same reason that spiders have skinnier legs than elephants.

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Mon Apr 10, 2017 7:45 am
by Bilco
Congratulations on a super build, Peter - and a masterclass in using alternative materials and techniques.

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Mon Apr 10, 2017 8:13 pm
by PeterH
Thank you Bill. Those techniques seem to be the ones that come naturally to me.

Re: A Decauvillish goods wagon: 1:25, 24 mm gauge

Posted: Tue Apr 11, 2017 12:38 pm
by docnjoj
That is a great looking van. The brake system looks quite realistic to me. Wheels could be a bit bigger as you said. Overall wonderful design and execution.
otherDoc