Small Goods running at CDOGG

Resplendent in Drummond II unlined green livery HR27 runs through the station on the club layout today with a short train of Highland stock. It was quiet in the clubroom this morning which gave me the opportunity to test the engine for over an hour on the circuit. Later I added a few more wagons that were brought in, though it was never a test of strength. I think it would manage a dozen wagons. I was  pleased with the engine's performance, it ran smoothly and gave no trouble at all. 

You can see some of the detail inside the cab in this rear view, the crew are my own sculpture, specially designed for this type of open cab. The Loco Coal wagon is built from a set of resin sides and ends which I produced myself. The wagon is completed with a mix of commercially available underframe parts and scratch built brake gear. 

The club has some great model makers and their buildings and other detail in the scenic section of the club layout make for a realistic scene.

Highland Railway 6-wheel 20 ton goods brake van, built from an etched "aid to scratch building", which I had made; the nickle silver sheet included all the hard-to-make-yourself parts.

HR 27 Small Goods, Jones Rebuild of 1891...finished

Nothing was easy constructing my Small Goods engine and the same was true when I came to paint it; my choice of paint, Precision P727 Dark Green 1905-1912, which suits the unlined Drummond II livery is now permanently deleted, only P725 Light Green remains in stock. I had a small tin of this fortunately and I experimented by using it as the base colour. I added matt black and by a process of trial and error found that simply adding black and nothing else made a credible match for the lost 727. You can judge yourselves from the pictures displayed here the degree of my success. I have no infallible recipe for the colour, making it was a haphazard business and dependent on continued supplies of 725.

Despite keeping my precious mix in a tightly lidded jar, to my dismay it dried up to a jelly overnight before I'd painted the cab interior. So I embarked on a further experiment using Revell semi-matt Dark Green 363 as a base. I added a good deal of matt black and rather less yellow (15) which produced a credible colour for the cab. I think success depends on the base colour being as near as possible to the colour you're aiming to mix. 

The cab interior is based on the drawing in Peter Tatlow's "Highland Locomotives" (p.57), showing the interior of a Loch Class engine of 1896. I think the cab of the Jones rebuild of the Small Goods was probably much the same as that of a Jones designed Loch. The backhead owes much to a Lochgorm Kits etched sheet; brass castings are mainly sourced from Laurie Griffin and 62C Models, revised to fit this particular cab. The oil can and grating visible in the center are my own white metal castings. 

The dark green base colour, mixed from my own recipe (above), was applied with a Badger Anthem 155 airbrush. The contrasting areas of black were brush painted using Humbrol matt black to which a touch of talc was added; when dry these areas were buffed with a soft toothbrush to produce a sheen. Transfers on the buffer beam and rear of the tender are methfix type from a rather depleted Guilplates sheet of Highland Locomotive transfers which are sadly no longer available. The number and maker's plates were etched to order by Light Railway Stores. 

 

The driver and fireman are my own sculpture though now available from Chris Smith at Invertrain Models in his "Heroes of the Footplate" range. The figures are designed with contrasting poses which maximise the restricted space available in the cab and by avoiding standing shoulder-to-shoulder they allow a good view of the interior and of the backhead details. 

The 4 ton capacity tender is identified by 9" Highland numerals. Design of these early tenders owed a debt to those of the LNWR, the coal had to be shoveled from floor level, a back breaking task.

 The tablet catching apparatus has a handle which goes into the cab between the side sheet and the stanchion. The fall-plate is shaped to clear the sand-boxes and allow the engine to negotiate curves on a club layout and also masks the un-prototypical, though most effective way, the engine hooks to the tender.

HR 18 Class, Small Goods.

HR 18 Class, Small Goods No.27 

Construction of this rather difficult prototype is now complete, the model has been built without the aid of a kit, though relying on commercial castings to complete it. Most of these were obtained from Laurie Griffin (LGM) practically all of them were modified in some way or other to suit this engine. The model ran with a light train on the club layout in Carlisle on Saturday where it performed impeccably, without a single derailment, much to my satisfaction.

I modelled No.27 as rebuilt in 1891 by David Jones the Locomotive Superintendent of the Highland Railway at the time and the engine displays many features typical of a Jones engine. No.27 was the last survivor of this class lasting until 1923. A grainy photograph shows the engine forlorn and abandoned at Culloden Moor, the short parallel buffers seen above are attested to by this source.

There was room inside the superstructure for an ABC Gears Mini Gooch with an M1833 motor and flywheel which provides plenty of power for an engine which typically was intended to pull a train of about 15 wagons. Weight is in the firebox between the driving wheels.

No.27 c. 1920

The tender is built from an etch given me to evaluate by Walsworth Models and described in an earlier  blog posting on 7/10/21 as "A tender in search of a Loco ". It was certainly a good help though I don't know whether it will ever see the light of day as a commercially available kit. The Small Goods, Glenbarry and  Medium Goods classes all ran with this tender, so a kit would be most welcome to Highland modellers. 

 

The reversing lever can be seen in this left hand view, emerging behind the sand box. Probably the most taxing problem encountered in building this engine was providing clearance for the cross head in the tight space between the inner and outer frames. The outer frames, front springs and cylinders form part of the superstructure which can be removed from the chassis to which the slide bars are attached. The "Culloden Moor" photo of No.27 provides evidence for the tablet catcher and the position of the front vacuum pipe.

The shape of the fall plate enables the engine to negotiate curves without it fouling the tender upright stanchions. The cab interior is typical of a Jones engine, details owe much to the cab of the Big Goods in the Transport Museum in Glasgow. On the left hand cab side sheet can be seen the handle for the tablet catcher. Backhead fittings are modified LGM and 62C castings, the reverser is of my own devising. 

Brass rivets are soldered into holes drilled in the outer frames and filed flush inside so as not to foul the chassis assembly when this is removed. 

Self-contained sprung buffers add a further challenge to the model maker; the buffer beam is mounted on the ends of the frames which protrude beyond the smoke box and cylinders. 

The large rivetted balance weights are a prominent feature usually hidden by the splashers in photos of the prototype in conventional pose with coupling rods on show. Note the sanding mechanism on the sandbox top and the difficult to make trim to the splasher/sandbox assembly. 

HR27 Small Goods-Making a Start.

 

HR27 Coupling and connecting rods have limited clearance due to the outer skirt/valence.

I have made a start, as you can see in the above photo, on a Small Goods or "18 Class" engine, No. 27 in fact, in the form that it was rebuilt by Jones in 1891. This will be built without the aid of a kit; there is no kit for this engine though an etched sheet was used as an aid to build the tender, which is the subject of an earlier blog posting of 7/10/21 entitled "A tender in search of a loco". I will rely as usual on Laurie Griffin's castings to complete the model. 

The initial difficulty I came up against was fixing the position of the slide-bars on the frames, so that the connecting rods ran freely, and ensuring that these parts, along with the coupling rods were slim enough to fit inside the deep outer valence or skirt. This was achieved by a process of trial and error and by gradually slimming down and reducing the parts to fit with files; there is not much room. The wheels require little side play as the wheel-base is only 15ft and this helps matters.

My reference drawings, from Peter Tatlow's "Highland Locomotives" show that there is space to fit an M1833 motor and flywheel inside the body shell, which should make for a powerful little locomotive. I have modified the drawing on pg. 20 to include the changes made by Jones when he rebuilt the class.   

Fitting the motor is the next step, then weight will be added in the ash-pan between the wheels and springing will be arranged for the front axle to make a viable mechanism. 

A Tender in Search of a Loco.

My model of an early Highland Railway tender was built using as a starting point an etched sheet of nickle silver parts, provided by John Percival of Walsworth Models which, with some revision, will be issued under this label as a kit. The tender is much in evidence in early photos of Small and Medium Goods engines and of the Glenbarry class. These locomotive classes were all rebuilt and upgraded by Mr. Jones in the later years of the C19 and the tender similarly underwent changes, in particular the braking system was modernised; the most noticeable feature of the changes was the replacement of the old wooden brake blocks with metal brakes and my model includes the features of the rebuilt version of the tender. There are no kits in 7mm scale of any appropriate locomotive to run with this tender and I know of no plans to remedy this omission. For my part I have an "18" class, Small Goods, in rebuilt form, in the early stages of construction in my studio, this will be no. 27, built in 1863, which survived as the last of her class until 1923. 

The design of the tender is derived from earlier HR four-wheeled ones and owes a debt to LNWR practice. The buffers are from Slater's, revised and altered to self-contained ones. Note that the tank is the full-width of the tender, with platforms, which sit on the frames, front and rear. 

Most of the castings used to complete the model are from the Laurie Griffin range, Laurie produces a list of useful parts for a Small Goods building project. The white metal springs and tender-top tool boxes are my own castings. The water filler will be replaced by an LGM casting of a more appropriate Jones design. 

I used a drawing of a Jones "Loch" tender for the details of the brake cylinder, pull rods and linkages beneath the tender.