Caledonian 264 class

[hatfielddoc]

With Maskelyne's dimensioned drawing in the 1938 MRN, you could draw up the end profile of the tank in 3D CAD and extrude it to the length required, then 3D print to get the correct basic tank body. You might add the tank details in the 3D drawing, or you could add them to the 3D printed body after printing.

Jim.

Oh thank you Jim, looks like another rabbit hole to disappear down just opened. I have been storing my sons "stuff" in the attic whilst he has a house extension . It includes his 3d printer! Might be payback time!
Even my terrible CAD skills could stretch to that I think.
Thanks to all again for the info
Ian

 

[gazman424]

Hi All,
Would this be of any use? I can break the body down further if you only require the saddle.
Gaz.

 

[hatfielddoc]

Hi All,
Would this be of any use? I can break the body down further if you only require the saddle.
Gaz.

Wow ,thank you so much, that is amazing.
After the conversation yesterday, I fired up fusion 360 last night and lost myself for 2 hours. I am self taught and use it rarely ,( wagon springs ,window frames, brake gear etc). So not having used it for 18 months it was a frustrating relearning curve! Loaded Maskelyne drawing as a canvas, generated curve of saddle tank front face then spent a frustrating hour only able to extrude as a hollow tank ,even thought all lines complete and that face turned blue. Ho hum planned to spend next weeks holiday re watching all my tutorials to identify my tyro error!
Then this post turns up . Thank you so much. Will still try and sort out my mistake as will , if I live long enough need the saddle tank for a 263 class. Besides this thread has shown me my dinosaur thinking.
I actually proposed butchering the hornby saddle building the rest in plasticard/ brass, maybe turning up a new chimney etc.
Satisfying but "a long way round"
I think some of that time spent brushing up/ learning to be more proficient at simple CAD would be time better spent.
Oh and replacing one of my lathes with a Mars or Saturn might get past the household exchequer!
Thank you again Gaz for your kindness,
Ian

 

[Tycho14]

There's a twist to this tale: it turns out that the 8 spoke cast iron wheel and its 12 spoke successor in real life had the same (10") crank throw and were therefore completely interchangeable. The problem is that unaccountably the Alan Gibson 8 spoke wheel has been produced with a 12" crank throw, while the 12 spoke wheel has 10"! Which ordinarily wouldn't be a problem and scarcely noticeable as long as both axles have the same Gibson wheels....!

Alan

 

[hatfielddoc]

Thank you very much for that update Alan. It makes such sense that the change in wheel sets would at least have the same crank throws.
Ian

 

[hatfielddoc]

It has been sometime since my last post.
Following ,I think ,some petitioning by my son , my birthday present arrived in early September. The household authority gave me an Elegoo Saturn 4 Ultra and the kids all the consumables. Unfortunately it's arrival coincided with a weekend away at the Highland Railway Society and then a hand operation which put me out of action till last week.
Absolutely itching to try it and eventually have done so. Good test prints and then tried the caley pug file so kindly posted by Gazman 424. Wow one small failure and then great result

 

[hatfielddoc]

Hit the wrong button !
The results are amazing just need to get the supports properly placed to avoid compromising the fine detail on the smoke box. I am now confirmed this is the future and though I have a steep learning curve ahead , I have to thank you all for pushing me over the edge of this rabbit hole.
No real time saving but no more burnt finger tips and far better results than my etched brass efforts. ,
Thanks Ian