Josie

[Bob JeppParticipant @bobjepp]

Decided to make a start on Josie – an O Gauge Hudson.

I've spent some time accumulating bits and pieces – castings etcetera – I did mop up the last few castings from G. L. R. before they closed.

So, I am just about to start cutting out the frames from the prescribed 3/4" x 1/8" BMS and I noticed that it is bowed about 1/8" in the middle of the 12" length. Thinking about it, I can't leave it bowed and expect the stays to straighten the frames since there are some quite small sections around the horns.

It then occurs to me that this might not be the right material at all – maybe it would be better to use black MS or even to purchase the laser cut frames from Model Engineers Laser – any suggestions ?

And, how straight can we expect BMS to be ?

[Bob JeppParticipant @bobjepp]

O Gauge 4-6-4 Hudson

[JasonBModerator @jasonb]

The cold rolling of BMS introduces stresses when you cut unequal amounts from one side it moves so black hot rolled is better but you are likely to have to use 3mm and make allowances for it.

As for being bent when supplied the smaller sections can be a bit bent if someone is not careful how they pick up a full 3m length as it will sag under its own weight.

J

[nigel jones 5Participant @nigeljones5]

Bob…listen to Jason and dont entertain using bms….ive just used laser mam Malcolm and i swear i will never hand cut another frame! Brilliant!

[Bob Brown 1Participant @bobbrown1]

There are always some issues with flat bar, hot or cold rolled and sheet/plate is probably the better option and I agree with fizzy, see **LINK** for the money it's a no brainer.

 

 

Edited By Bob Brown 1 on 04/05/2014 21:06:18

[Carl WalkerParticipant @carlwalker]

Hi,

 

How are you getting on with that Josie, Bob? I have just bought the plans from Kennions GLR, and after a quick perusal, I wondered if construction was ever written up in ME, and if the construction articles are available anywhere? I could do with a bit more detail on the boiler construction. Mind you, I am also mulling over whether to build Josie with a water-tube boiler for gas or spirit firing, shouldn't be too hard to design.

I see that the trailing bogie sides are available as castings from GLR, shich would be easier than trying to make them from scratch with all that detail. I'll also be making use of the laser cut parts available for Josie, those main frames look quite tricky to do by hand!

Cheers

Ricky

 

Edited By Ricky Walker on 24/01/2015 16:48:49

[John BaguleyParticipant @johnbaguley78655]

Hi Ricky,

Josie was described in ME Vol 69 issues 1685 to 1696.

John

[Carl WalkerParticipant @carlwalker]

Thanks John,

I don't have that volume in my collection, so I am going to upgrade my subscription to allow me to browse the archives, hopefully the articles will be in there.

Cheers

Ricky

Juat checked, and the archives only go back to 2001, so no point in upgrading my subscription.  I'll have to keep an eye out on eBay for the relevent volume.

Edited By Ricky Walker on 26/01/2015 10:29:50

[Carl WalkerParticipant @carlwalker]

I managed to get a bound copy of Vol 69, so have all the Josie construction articles. So I'll probably start construction of Josie later this year, after finishing my toolpost, and after my visit to the Harrogate show.

The volume makes very interesting reading, especially seeing the latest tech of 1933, and much discussion of large versus small cylinders in model locos.

Cheers

Ricky

[Bob JeppParticipant @bobjepp]

Good to see that there is still some interest in Josie.

I have spent some time working on a 3D model of Josie ( just because you can, and its warmer indoors during the winter ). I have discovered that there is an awful lot of information missing ( as we used to say – Left To Toolmakers Discretion ! ).

I've had some problems understanding the geometry of the Pilot Beam – there seems to be some contradictory dimensions relating to the overall height of the front of the beam, the hole positions for the cowcatcher and the round top slots which don't appear to work out as they are shown on the original drawings – any ideas as to what is right or wrong ?

I also have the appropriate ME's but I find the mixture of Josie with the other locomotive etc. quite frustrating – even thought of trimming out those superfluous texts by some means or other.

Made a start on making swarf – the bar frames worked out well from BMS ( took some off both edges of the stock to stop it bending ).

I was lucky to get hold of some castings from GLR before they closed in Daventry, but having made a start on the pilot beam, I realise that there is nowhere near enough spare metal on the casting to allow it to clean up once the bends and twists are removed, so, have now acquired a suitable lump of brass and have to start again. Will be ready to start assembling the frames once I have bottomed out the pilot beam.

[John BaguleyParticipant @johnbaguley78655]

One of the chaps in the 2½" gauge Association made a 2½" gauge Josie by doubling up the dimensions. It makes a nice loco.

John

[Carl WalkerParticipant @carlwalker]

HI Bob,

I know what you mean about the drawings, there are a few things I noticed myself, especially in the boiler drawings, The firetube positions are not dimensioned, and there is no view of the smokebox tubeplate, for starters. I also noticed that my drawings are printed slightly larger than full size, so can't easily measure off the drawing for missing dimensions I see what you mean about the contradictory measurements of the fromt of the pilot beam too, the side view of the main frame and pilot beam gives the pilot beam as 3/4" tall, but the measurements on the front view of the piolot beam are 9/16" + 1/8", making 11/16" height in total, 1/16" less (see, I CAN work in Imperial, lol). Your idea of making a 3D CAD model is a good idea, may help to sort out discrepancies before you "cut metal". In this instance, I would say, try to change the 1/8" for the top section of the pilot beam to 3/16" and see how it looks.

I can't figure out what those slots in the pilot beam front actually do, or are they just copying the shape of the full size original?

GLR still seem to be alive – now trading as GLR Kennions Ltd, – and they have several Josie castings advertised on their website, as well as some suitable wheels. I have them bookmarked for when I start my Josie

John, really like the pic of the 2-1/2" Josie.

Ricky

[John BaguleyParticipant @johnbaguley78655]

Hi Ricky,

The original pilot beams were often made from lengths of boiler tube with the ends flattened and bolted/rivetted to a frame so the 'casting' does sort of represent the full size versions.

John

Edited By John Baguley on 13/02/2015 00:29:14

[Bob JeppParticipant @bobjepp]

Having completed a small extension to the workshop ( amazing how much extra space you get from an 8 foot long extension on a garage ), there is now enough space to swing the proverbial cat !

Well, a few gallons of water have gone under the bridge – I've managed to get most of the frames completed, together with the stays, axle boxes, pilot beam etc. and some of the bits for the leading and trailing trucks.

Back to the 3D CAD again and trying to sort out how the cylinders are attached. I've found that there is some steering contained in the construction series – it says that the horizontal centreline of the cylinder bore should pass through the wheel centres ( when axle-boxes are in mid-travel ), but then there seem to be some more anomalies surrounding the position of the exhaust tapping. Additionally, there seems to be an error of 1/16" in the positioning of the smoke-box saddle so, I've made the assumption that the distance from the leading axle should rule ( haven't checked it all out yet though !).

Anybody else got any more comments please.

I tried to order the cylinder castings and wheels from GLR Kennions Ltd. today, but there seems to be a problem with the coupled wheels part number – I'll send an email and await a reply.

Bob

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