British Locomotives for Gauge O

Hello everybody,

In this thread I would like to present my recently started design project of the BR Class 28, which is a rare model in this scale and which would nicely fit on any Gauge-O-Guild layouts.

This is a rather challenging project for this unusual model shape, firstly because of its facial window shape is irregular, secondly because of the unequal amount of ventilation openings and re-positioned doors on both sidewalls and finally because of two different bogies under the frame.

There are several vintage and modern painting variations of this locomotive type livery, but mostly are appreciated the classic BR colours.

This is my first attempt to enter the Royal railway modelling scene and probably I require some time to study few distinct British gauge O standards in order to be able to equip this locomotive with the suitable components, such as bumpers, coupling, wheel sets, etc.

This project is slowly progressing and therefore comments concerning improvements are welcome.

Here are the first impressions of the yet unfinished hollow body shell...

Regards,

Johannis

Hello everybody,

Here are the next design steps, but still a long way to the maturity of this project...

Regards,

Johannis

Hello everybody,

This project is slowly progressing and more details are visible for the rivet counters among us...

Regards,

Johannis

Quote from HFy

One class 28 survived: http://www.d5705.org.uk/

Herbert

Thanks, Herbert, for the link, which is a very interesting website containing historic photos.

Let's try to replicate this exotic locomotive type in miniature for the O gauge community.

Regards,

Johannis

Hello everybody,

Here are the first results of the cab shape with the fan section speed-printed at lowest resolution just for testing...

Regards,

Johannis

Thanks for the correction comments.

The next version will be improved in many aspects.

The front doors will be reshaped. All doors will be fixed in closed position to reduce costs.

About the fan with rather small diameter I will make two versions, one with integrated coarse grid and...

...one without any grid for allowing to be attached a photo-etched grid from a suitable military etch kits.

Initially there will be only a simplified static impeller with 6 blades (still to be checked if the prototype had 3, 5 or 7 blades), but to have a rotating impeller would be rather complicated and costly.

BTW, recently I purchased a BR Class 08 shunter and I liked the flexible brake hoses made of rubber material by Dapol.

Regards,

Johannis

Hello again,

Probably I have to make my own vintage bumpers with elliptic bumper heads and integrated bumper bases embedding spiral springs to be fastened with nuts and washers on the inner side of the body shell. This concept must be proof-tested.

Regards,

Johannis

Hello everybody,

Most of the exterior bodyshell details have been added, but don't mind about the imperfections, I will fix them later.

Concerning the roof details there are some minor and major differences while comparing a vintage OO scale Hornby Dublo model against a new N scale Rapido model. For example on the roof of the Rapido Class 28 model the twin chimneys for the smoke exhaust are not in parallel position. In other cases there are more or less rivets in various roof positions. Probably on some of the locomotives had been engineered modifications during their life-time at the maintenance workshop.

Regards,

Johannis

Hi everybody,

Here is the Y-shaped channel connecting both exhaust chimneys to the smoke unit to be installed where the fluid drops (Seuthe?) are supposed to drain down and the smoke clouds to climb up.

Have a nice Midsummer weekend.

Regards,

Johannis

Hi again,

I tried to shape the interior by embedding support structures for the assembly of a possibly segmented body shell and for the mounting of the frame with bogies and tanks hanging below...everything still in progress...

Regards,

Johannis

Hi everyone,

After a short summer break we are back again to present the preliminary bogies of the BR Class 28. Each side (front and rear) have different amount of wheelsets (3- and 2-axle bogies). Therefore I had to design two differently shaped truckframes (almost Tri-Mount & Alco-style from the early diesel era) with bearing covers, spiral spring suspensions and sandboxes. The bogies are still in pre-mature state, because the triple wheelsets don't run easily on narrow curved tracks, which must be tested. More project updates later to come...

Regards,

Johannis

Hi again,

Just for comparison are here depicted the small size Class 28 from Hornby Dublo in OO scale and from Rapido Trains in N scale.

The air pressure tubes and piping in general under the frame will be done out of copper wire.

The first samples of 3D printed parts for the O scale model are on the way.

Regards,

Johannis

Hi everyone,

Here are the testings of the rapid 3D-printed bogie frames with smoothly rolling metal wheelsets for the dummy version of this end-cab diesel locomotive type.

Regards,

Johannis

Hello again,

Here are the tanks and other equipment covers to be mounted below the body frame . The piping is still missing.

Regards,

Johannis

Thanks, Andrew,

I am very grateful for so many beautiful photographs. I can imagine it was an interesting visit at the British railway museum. Surely those pictures will help improving this project to elevate the O gauge model on a higher detailing level. At this moment I am working on the cab interior (instruments and figures) and the engine room (to see how to mount the DCC-board and the smoke unit). For the human figures I have several possible choices (with or without sitting driver on one or both sides, with or without standing machinist in same or opposite cab), but I haven't decided yet. Later I will get back to the external details of the outer body shell as depicted on the above photographs.

Regards,

Johannis