Midland Clerestory Stock

[John Candy]

Midland Clerestory Stock

The next 3D Print 4 Yourself carriages will be Midland Bain 54ft clerestory corridor stock, built between 1905 and 1907.
First will be a brake third to D561 (one of the final Lot with revised panel heights and three-vane louvred door vents).
The other will be a first/third composite to D469 (again a late example with the revised panelling).
The quarterlight bolection mouldings will be separate prints to be inserted into the main side modules (this method was previously used for the GWR F14 model).

They ran on 8ft bogies which will be added to the "monobloc" range.

Examples of both types remained in revenue service until after WW2, with the last brake third being withdrawn in 1953.

The test prints of the brake third are well advanced but (being black) are not easy to photograph until primed with oxide.
Screenshots of the OpenSCAD/STL renders are attached to illustrate the design.
The compartment side is first, followed by the corridor side.....there are considerable differences in the panelling/door arrangement., unlike most carriages where a mirror image is more usual.

[John Candy]

Now it has warmed up and the sun is shining, the test prints of the brake 3rd have been primed.

The sides of the matching 1st/3rd composite are currently printing.

The next challenge is the clerestory roof which will be quite tricky but another week should see the parts printed.

[John Candy]

The sides of the 54ft Bain corridor 1st/3rd composite in primer.
The corridor side is shown above the compartment side.

Points to note are:
1) This is an example of a late-built Lot with revised panel heights, three-vane louvre ventilators (instead of four) and an absence of ventilators over the intermediate droplights on the corridor side (earlier Lots had vents matching those on the doors).
2) Did you spot the missing quarterlight? These carriages had four third class compartments plus two and one-half first class .... hence the odd arrangement of quarterlights.

The ends are currently printing and the roof has reached the OpenSCAD stage.
My intention is to construct the roof with primary emphasis upon strength. The intention is to produce a tri-arc full-width roof and then plant a separate clerestory module upon it.

[John Candy]

The ends...one fitted with the alarm gear and both with optional electric lighting jumpers ..... these carriages were originally gas-lit but most, if not all, were electrically-lit by the time of the 1923 grouping. The STL files will include the jumper connection socket and pocket as "add-ons". 

[IanT]

Very clean prints John. What orientation are you using?  (Flat on bed or upright?)

Regards,


IanT

[John Candy]

Ian,

The ends were printed flat on bed with "ironing" enabled whereas the sides were printed upright with supports.

Regards,
John.

[John Candy]

The clerestory design is proving more complicated than anticipated.

A few issues/uncertainties remain to be resolved in respect of the glazing/panelling of the clerestory on the Bain 54ft corridor stock.

The drawings I have (by Arthur Whitehead in "Historic Carriage Drawings Vol 2") show arrangements which differ from some photos.  In particular, the drawings show "perforated" ventilation panels which in many photos are in fact louvred vents (the ex-works" as-built photos appear to show the perforated type) . A 1913 photo of the brake 3rd damaged in the Ais Gill collision clearly has louvred vents, which suggests the conversion to louvres was an early modification.

Another unanswered issue is whether the glazing was "clear" , "frosted" or otherwise treated?
Did the LMS paint or plate over the glazing?

Can anyone provide some answers/photographic evidence?

[Doddy]

Midland Railway Carriages: Volume Two Written by R. E. Lacy and George Dow
First published in 1986 in Great Britain by Wild Swan Publications, 499pp, ISBN 0906867363

The Photo listing for this book mentions Photo 189 - "A striking representative of the Midland crest, the Wyvern, once the emblem of the ancient kingdom of Mercia, appeared in the opaque glass of some carriage lavatory windows"

Also:

54ft BOGIE LAVATORY COMPOSITE CARRIAGE Diagram No.1280 Drawing No.5338 Dated 1921:Shows the lavatory layout, but no mention of the frosted glass windows.
https://midlandrailwaystudycentre.org.uk/documents/88-D1019.jpg

Perhaps the center can help?
https://midlandrailwaystudycentre.org.uk/index.php

The Midland Railway Study Centre web site is maintained by Dave Harris, the Study Centre Co-ordinator
Email: enquiries@midlandrailwaystudycentre.org.uk

[Anthony Terranova]

Let me have a look John. I have midland carriages volume 1 & 2 by R.E, Lacy.

Kind regards

[Anthony Terranova]

Oh dear. A mixed bag I think John. Some had louvered panels, some no panels at all, some solid openable panels and some clear glazed. I think photos of the particular diagram will be needed. I haven't seen any in the books with frosted glass though (from what I can tell on grainy black and white photos).

[John Candy]

Thank you for looking.
I rather suspected that would be the case. The only known photo (according to Historic Carriage Drawings Vol 2) of a D561 brake 3rd is that of No.123 which is shown as damaged after the 1913 Ais Gill collision. The other photos are of both sides of a D469 composite (but not the same carriage) and there are variations since they are from different LOTS. They both still have perforated metal vents.
My suspicion is that the majority, over time, had the perforated vents replaced by the louvred type and that the LMS painted over the glass (which would account for opening, apparently unglazed, panels.
I have prepared the attached for the composite.
My attempt at the buffers is also attached, prepared from photos. and rather sketchy drawings.

Drawings are notoriously unreliable and that again is the case with the LMS D1778 50ft PBV which I am working on. The drawing shows an inward-opening guard's door (with corresponding grab rail positions) and a Midland guard's lookout (the rounded-edge type). The photo I have is of one of the last to be built (in 1928) and it has outward-opening guard's door and an angular,  pressed steel, lookout (the type as fitted to Stanier-era stock).

[Anthony Terranova]

This might be of interest on the duckets John.

Let me know if you want some dimensions.

All credit to the original author of the drawing ofcourse.