RLWP

1 minute ago, Ozexpatriate said:

The mortal enemy of model railways - Felis catus.

Ah, indeed

Richard

3 minutes ago, Paul Cram said:

I have a Zeus reference book which has log and anti log tables in it along with a lot of other useful information such as tapping and clearance drill sixes for different threads

Now that is a truly useful piece of old technology. The bit I probably use the most is the metric/imperial table in the front

I have two of those in regular use

Richard

5 minutes ago, JimC said:

Yes, she's beautifully kept, and a credit to her owners, but that's arguably very much a special occasion level of presentation, and back in the day, as a working shunter in the docks, I suspect its most likely that all the polished metalwork above footplate level would have been painted, and possibly none too many layers of paint either. But maybe we can imagine a royal visit to the docks?

My impression is, some of this 'customisation' is a shed or even crew thing rather than a company practice. ISTR some sheds turned out their locos with certain distinctive features

So, a crew that works often with an individual loco with time on their hands might do such a thing

I doubt Swindon would approve

Richard

1 hour ago, neilkirby said:

Hi,

 

whereas when I look at the same pic, I think I can see daylight just by the back end of the spring over the front wheels!,  I think a similar question came up on either the 'W4'  or the Hatton Barclay thread, and the counter question was then, "can you see daylight under the boiler on the real thing?" Picture below for discussion purposes only.

 

regards,

 

Neil

I can't even see the damn spring!

Richard

A good coat of something tar based as used on everything else would be a fair guess

Richard

Looking at other yard cranes, I wonder if the central cross bar originally had a wooden roller for the chain which has now rotted away

Richard

There is quite a lot of interesting pyloning going on around the M42

https://www.google.com/maps/@52.4463484,-1.7116941,3a,75y,36.99h,99.87t/data=!3m6!1e1!3m4!1sdtlhy0jY5x6QDdcu_R-Gxg!2e0!7i13312!8i6656

Richard

2 minutes ago, Hilux5972 said:

Would be easy enough to trim with a sharp scalpel. I did this with my USA Scotsman as the tenders rear bulkhead was curved over the top, rather than stepped as it actually was.

 

 

Yes, but not at the best part of £30 for the tender body!

27 minutes ago, Grovenor said:

See https://www.google.co.uk/maps/@51.5021879,0.0433321,3a,75y,270h,82.36t/data=!3m9!1e1!3m7!1s7kSSavW-kMeKQb3kt_WbYQ!2e0!7i13312!8i6656!9m2!1b1!2i46

Here, I think...

https://maps.nls.uk/geo/explore/#zoom=19&lat=51.5023&lon=0.0426&layers=168&b=1

Richard

Just now, 34theletterbetweenB&D said:

Ane fule no it is a Charles.

 

Then again you might tell this ignoramus just what it is?

It's a lightly modified Backwoods Miniatures Charles. 

Richard

23 hours ago, GeoffBird said:

Has anyone thought about applying metal nameplates to e.g. "Westminster"?  Source?  I am assuming the plate would have to be bent (curved) slightly to fit to the saddletank side.  Comments please.

Best bet for plates is Narrow Planet

These are NP plates:

Although obviously not a Peckett..

Richard

Not a good image:

https://www.cgwht.org/

Chances Glass Works in Smethwick had two connections to the railway via bridges over the canal, ornate gatehouses and wagon turntables

Anything is possible...

Richard

I clicked on the link in your post which opened the image. I then right clicked and copied the address of the image, then pasted the address straight into a post

Richard

Richard

34 minutes ago, runs as required said:

 

I can’t explain the appearance of an early Gateshead Angel to the east of the mine.

It may well be a ventilation device on top of a shaft. In 1556 Agricola illustrates something similar but smaller in De Re Metallica (in my translation, Book VI, page 201). The ones illustrated are four boards mounted vertically in a cross shape to deflect the wind down the mine

On page 205 he illustrates windmills used to drive fans for ventilation and in other parts for water pumps. This may explain the mills in Gibsons picture

Richard

My Mum used to temp at home using a Comptometer, a machine that has fascinated me since

Richard

On 21/08/2019 at 10:15, webbcompound said:

The LNWR had quite a lot of chaldrons in Cumberland

Ahh, I was going to ask about that - thank you

Richard

17 minutes ago, melmerby said:

It's also how fridges work.

Compression produces heat which is dissipated in the radiator, it then expands inside the pipes in the fridge and absorbs heat cooling the fridge interior.

I'd really like to see the words 'condense' and 'evaporate' in your description to be sure you understand that this relies on the working fluid going through phase changes

The key thing is the fluid going from gas to liquid (and back again in a fridge), which is where the big energy changes happen

Richard

56 minutes ago, Porkscratching said:

You could do!...but I've been trying mine with various other calculations and it's quite fun in a bizarre way doing some simple 'maths' with it, I'm glad I added it to my stock of "olde fashioned" engineering kit anyway.. And thanks again to David Foulkes for his excellent, clear tutorial earlier in the thread..

I also have a soft spot for ancient tech, even so a slide rule was a fabulous piece of kit that is outclassed by any cheap calculator

Do you want a set of four or five figure log tables?

Richard

Did I assume that?

5 minutes ago, melmerby said:

It is still a relationship between pressure, volume & temperature (Maybe a different person's law?)

A gas contained in a fixed volume will reduce in pressure as the temperature drops, so even if you had a gas (say nitrogen) in a vented vessel, heat it up so that it expands, the surplus will escape.

Seal the vent, cool the vessel and the pressure inside will drop, it is now below atmospheric and the outside pressure can cause the vessel to collapse.

With the addition that as the water vapour cools, it goes through a phase transition from gas to liquid. The can that was full of steam is now full of - well, almost nothing. This leads to a dramatic pressure change and an impressive demonstration of air pressure for a classroom full of kids

Richard

Now, I wonder

I bet you can date a picture of a rugby pitch by the players kit, ball type, positioning of lines and flags...

So the same would be true of a model rugby pitch

Surely there is no detail on a model railway that cannot be 'rivet counted'

 Richard

Presumably, slide rules being cheap and all, you could by one for a particular scale conversion, glue the slide in place so it doesn't shift, and throw it away when the job is finished

Richard