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John M

J M Design GSWR/GSR/CIE 52 Class/D17 4-4-0

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About 12 months ago I (rashly) offered to build a model of a D17 in connection with the Ballyglunin station restoration project, a producing a kit appeared to be a better option than a scratchbuild as I wanted one for myself and a number of people expressed an interest in a kit.

 

 

The design work for the loco (body) is reasonably advanced with the option of building the loco with a saturated round topped boiler in GSWR/GSR or CIE condition including variations in cab and the option of large or small tenders.

 

This posting is basically to canvas the level of interest if there is sufficient interest to produce the loco with the option of.

 

1. raised roundtop firebox and waisted smokebox as in the photos of 1, 54 and 98 or

 

2. straight sided smoke box and  flush round top firebox like 59 (The Tuam engine) similar in appearance to 60 Class 4-4-0 No 64.

 

The kit as designed includes parts to assemble the loco in either GSWR/GSR or CIE condition.

 

The 52 Class is likely to be challenging to build due to the small size of the loco and complex multi level running plate arrangement.

At this stage I am looking at offering the kit as a set of etched parts (similar to Worsley Works) rather than a complete kit with castings, wheels gears and motor.

The chassis and valences will be in 0.4mm nickle silver for strength the remainder of the loco in 0.4mm brass.

 

 

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No 54 GSWR/early GSR condition with type B tender

 

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No 1 GSR condition with type A tender.

 

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98 early CIE condition with extended cab & type A tender. 98 still has GSWR style smokebox with double doors and raised round top firebox.

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60 Class (D14) no 64 with straight sided smokebox and flush round topped boiler.

 

The 60 Class were built concurrently with the 52 Class were slightly larger and more powerful and took over the principal expresses of the GSWR (Dublin-Cork& Killarney) while the 52 Class worked the secondary routes.

Both classes became largely redundant following the introduction of the AEC railcars though members of both classes survived into the late 50s. The 52 appear to have worked lighter passenger trains over the ex-WLWR lines from Limerick to Waterford & Sligo, and between Kingsbridge and Waterford and branches and the North Wexford line.

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Indeed they were. Jonathan Beaumont's splendid book shows No57 at Westport, in original condition, with the double smokebox doors. Lovely!

If you can blow the etches up to 7mm scale, I'll certainly buy one.

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To a certain degree the ex GSWR & MGWR lines were operated as separate systems up to the early 1970s.

 

Following the Amalgamation GSWR & MGWR locos with certain exceptions tended to keep to their respective sections

 

57 may have been on loan to Westport for use on the Achill branch to cover an Achill Bogie that was out of service for repair, on the same day as recording 57 at Achill H.C. Casserley recorded Achill Bogie 534 entering Newport on a Westport-Achill mixed train.

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Test etches arrived for the 52 Class this week, next challenge is the trail assembly but I first need to complete a number of un-finished projects on my workbench.

 

 

IMG_4435.JPG.d0f59c0d34f8200576a5b49416c8cdde.JPGIMG_4436.JPG.d09dd1d3ee6be9b3d13ac9708dbef8a5.JPG

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Some progress with the test assembly of the 52 Class.

IMG_4582.JPG.913e228192a76860fcd9246b07011ff6.JPG

 

Major sub-assemblies, loco body, loco chassis & bogie, tender chassis and SSM J15 tender.

This loco is modelled on GSWR No 1 running in late GSWR/early GSR condition with 3 ring raised round topped boiler as a racing machine with short cab roof.

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Loco body sub assemblies. 

The footplate running board assembly is similar in concept to the SSM J15 & S7 LNER D16 https://www.rmweb.co.uk/community/index.php?/topic/147957-7mm-lner-d163-two-years-down-and-nothing-to-show/ and is surprisingly strong once the splashers and cab side sheets were soldered in place. 

The kit is designed to be assembled with a raised firebox, the flange between the boiler and firebox is a lost wax casting from a 3D printed master.

Boiler smokebox assembly is a bayonet fit to the cab at the firebox end the smokebox bolts to the running board.

Some adjustments are required to the smokebox, boiler and firebox wrappers for the production tooling. Funnily enough no major corrections are required to the footplate/valence sub assemblies.

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Loco chassis. I assembled this particular loco to run on 21mm gauge track with a compensated chassis using High Level hornblocks and Gibson wheels, turning the axles from 1/8" silver steel, I have used a 2mm wagon axle as a temporary pivot for the leading rocking axle. Inside valve gear is based on a Beyer Peacock 101 Class GA and likely to be similar to that fitted to contemporary GSWR classes. No significant issues were identified with the chassis though I need to open up the clearance hole for the bolt that secures the smokebox to the running plate.

IMG_4588.JPG.b247ce2cefe6573d7dedec83149c99c3.JPG

 

The bogie is simple enough the pivot arrangement is recommended in John Ahearn's "Miniature Locomotive Construction" and Guy William's "4mm Engine" and minimise the risk of shorting against the frames compared with the usual swing link arrangement. Wheel sets are retained by wire keepers which feed through holes in the bolster/framespacer not unlike hornbox keeps.  I will probably add additional  frame spacers/stretchers at the bogie ends

 

Wheels are again Gibson axles 2mm silver steel with the ends polished off in the Unimat SL.

IMG_4593.JPG.c2db2f3d289d33032c405c6fde354c93.JPG

 

Tender Chassis.  I designed a tender chassis with floating leading and center axle on the "Sharman free bogie" principal for use with the kit for improved traction compared to a conventional tender chassis, the kit includes the longer extended coal plates which appears in some photos of 52 & 60 Class locos with this form of tender. I may at some stage produce a fret for the 2500 Gal tender introduced for use with the 52 Class and later used with smaller GSWR locos on long haul passenger and freight duties.

Again the chassis securing holes need to be enlarged on the tender.

Next stage will be to set up the motor and gearbox and pick up system before assembling the loco and tender brake gear, I usually use an underslung gearbox arrangement with a vertical motor in express passenger locomotives which may be challenging in a 52 Class!

Edited by John M
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On ‎01‎/‎09‎/‎2018 at 01:04, John M said:

To a certain degree the ex GSWR & MGWR lines were operated as separate systems up to the early 1970s.

 

Following the Amalgamation GSWR & MGWR locos with certain exceptions tended to keep to their respective sections

 

57 may have been on loan to Westport for use on the Achill branch to cover an Achill Bogie that was out of service for repair, on the same day as recording 57 at Achill H.C. Casserley recorded Achill Bogie 534 entering Newport on a Westport-Achill mixed train.

 

Correct. As always there's an exception to any rule, and 57 was just that! While rare, 57 was a regular on the line for a very short period. I was never able ascertain why. I have zero evidence of any other member of the class ever having going anywhere near Achill.

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That's really rather good! Would definitely be interested if and when they are available 

 

Nestor 

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Further progress with the assembly of the 52 Class though I might have to re-number the loco or complete in GSWR livery as I managed to assemble the loco with a different boiler to the study photograph without noticing until the loco is nearly complete 

 

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Firemans side.

I assembled No 1 with a 3 ring boiler in accordance with the GSR diagram rather than the 2 ring type fitted to the loco in early GSR days. Ironically I designed the boiler to be assembled in either form.

Boiler fittings are from the SSM J15, safety valve needs to be re-seated, not sure about the profile of the dome. Buffers and tender toolboxes are brass castings from 3D printed masters.

The tender body is SSM GSWR 1864 Gal tender with extended coal plates which often coupled to small ex-GSWR tender locos in GSR & CIE days.

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Driversides. Vacuum brake pipe 0.9mm brasswire soldered under the running board, the curves in the pipework also tended to look a bit agricultural on the full size locos.

I will probably end up replacing the boiler and firebox on this loco as I need to make a number of corrections to the production boiler and firebox wrappers.

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Assembly of the loco body is substantially complete, whistle and cab interior to be added, I need to fabricate a tender floor and coal plate and fit axleboxes and springs (after painting).

 

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