Archive for December, 2008

There’s more to etching…

December 31, 2008

On top of the 3D artwork done for my own line and other clients, I have a modest amount of components etched for my kits and other sources. I don’t do the physical etching myself, however the artwork design is a big task. A project that I’ve been wanting to get down for a while has been a footbridge for my layout in-planning/construction, based on a structure that existed at Elmore, Vic, on the Bendigo to Echuca line. Incidentally, my layout will take heavy influence from this location. The prototype was demolished in the mid 80’s (around the time I was born!), so the artwork is based on various estimates and proportions. An image of a similar structure with people crossing at Echuca gave a relative height, a nominal width of 1500 across the crossing, and the structure was made to span 150mm in 1:160 scale (N).

Un-filled etching artwork for Elmore Pedestrian Bridge

Un-filled etching artwork for Elmore Pedestrian Bridge

The main span of the bridge is formed from two pieces of brass as can be seen – an outer wrap (with fold-over reinforcement angle at the top), and an inner U-shape with the timber decking detail. Knowing my luck, someone will produce a photo showing boring steel plating over the walking deck… but mine will still look flash!

Detail view of assembled bridge

Detail view of assembled bridge

Still to be drawn is the stairwells/vertical supports at each end, with individual steps to slot/tab together!

Overall view of the bridge

Overall view of the bridge

I wouldn’t ordinarily do a full generated 3D view of an etched part due to the vast amount of work involved, however I was keen to see the overall perspective of it. It’s difficult to estimate whether the necessary thickness of etched brass elements will look too ‘chunky’ in 1:160 or not, however I think I might’ve captured it this time. Just out of interest, the widest ‘track’ of brass on the artwork above, the ‘beams’ under the floorboard, is 1.5mm wide! In 0.15mm thick brass! Yikes.

The above artwork took approximately 6 hours to draft, with about 4 hours’ work still to do.

Coal Hoppers

December 30, 2008

I have two coal hoppers in the works at the moment, both N-scale models and both for my own line of model railways products, ‘Ethan’s Models’. The first is a QR ‘VSA’ hopper, a modern 110T stainless wagon run in the coalfields of central Queensland. The ‘bin’ section of it features lower down the page. The second wagon is a NSW SRA (and now Pacific National) NHFF hopper. This was the first piece of 3D modelling that I undertook, some 6 months ago now, and only just nearing completion! It will be made up of numerous pieces of etched brass, and four blocks of cast polyurethane, generated from rapid prototyped masters.

Rendered views of the NHFF hopper

Rendered views of the NHFF hopper

Two little wagons…

December 27, 2008

I sat down and drew up a wagon body to suit the Aust-N-Rail NSWGR ‘K’ truck chassis some time ago – the I/IA wagon, a smaller, all-steel counterpart to the Victorian ‘GY’ (incidentally, this uses the same chassis moulding as the ‘K’ and VR ‘B’ van, with an extra few parts applied). These Aust-N-Rail chassis have proven to be a wonderful contribution to the Australian model railway industry – high precision, excellent running qualities and fine detail.

Victorian Railways I/IA Wagon Body

Victorian Railways I/IA Wagon Body

The ‘success’ of this item has led to an even more widespread and popular item, a bodyshell and small components to produce most of the variations on the VR ‘GH’ grain hopper. The prototype was a tedious rebuild of old GY open wagons, with two different styles of top filler hatches and two styles of dump doors underneath, along with miscellanous differing details of ladders and handrails.

Victorian Railways GH Wagon body with accessories

Victorian Railways GH Wagon body with accessories

Each wagon has had around 12 hours’ drafting applied.

The ‘SCT’ PBGY Wagon project.

December 26, 2008
PBGY wagon, 3/4 view

PBGY wagon, 3/4 view

This wagon was commissioned by SAR N-scale Detailers to accompany their range of vehicles for the enormous SCT trip-trains across the Nullarbor. This bodyshell will be rapid prototyped, modified slightly to accept a chassis casting, and set in a rubber mould for casting in polyurethane. The defining feature of these wagons is the ‘corrugations’ along the side, which would prove extremely difficult to build in brass or plastic for a traditional model master.

SCT 'Multi-Freighter' PBGY wagon in N

SCT 'Multi-Freighter' PBGY wagon in N

The process of developing up in 3D was surprisingly simple and straightforward, once the misproportioned (but excellently detailed) general arrangement diagram was traced over. The 3D work and rework took as long as the tracing process, all up exactly 10 hours work.

SCT branding mockup

SCT branding mockup

Introduction

December 26, 2008

Hello all,
The point and purpose of this page is to show off some of the projects that I have been working on over the last few months. I’ll go into further detail on several of these items in upcoming posts… for now, some happy snaps!

Detail view of SRA 47-class long hood

Detail view of SRA 47-class long hood

HO-scale Freight Bogie

HO-scale Freight Bogie

QR VSA Coal Hopper in progress

QR VSA Coal Hopper in progress

SCT 'Multi-Freighter' PBGY wagon in N

SCT 'Multi-Freighter' PBGY wagon in N