Member postings for Benedict White

JasonB, given that the tube end plates on top and bottom of this proposed boilers are equivalent to firebox plates, could you put in 0.040" as the firebox plate thickness and see what it says for stay spacing and thickness please?

Many thanks Jason. Does it have anywhere to put in the end plate thickness or does it assume barrel thickness?

If so, does it suggest any stay dimensions in terms of spacing and thickness?

JasonB, does the spreadsheet you have say anything about end plate thickness?

There are often old lathes at surprisingly good prices on Facebook market place.

It has an ID of 2.54" (like the one in the thread mentioned above:

https://www.model-engineer.co.uk/forums/postings.asp?th=75370 )

And from calculations using formulas in K N Harris's book as well as the latest guidance that should be happy at 75 PSI.

I am very grateful. Could be the same chap, I'd have to see how he signed his drawings. Be spectacular if it was.

Many thanks Noel, however I am working from a bit of pipe not in a design.

It is going to be a multi tube boiler which will reduce the need for stays, but it is also 40 thou thick so what I was looking to do was confirm what thickness would be acceptable. The literature does have tables but all start at 1/16 or there abouts including the tables in the Australian code.

Many thanks Ady1. I take it that is Volume, issue, page?

Many thanks for your reply.

I have spent quite a bit of time searching, though not on here.

Oddly the first thread is of what is probably exact the same type of pipe.

However no post mentions calculating end plate thickness or burst pressure.

I have read K N Harris and am working though Martin Evans book, also I have read the FMES guidance on boiler calculations. So far I have not had sufficient sight of the Australian code to know if that helps.

Does the Australian code contain the calculations for end plate thickness? It seems to me that I would need to establish that then go on to stay calculations for my project.

Many thanks in advance.

It is a chassis. I will try to post photos and can post photos of the drawings. However, given the drawings are the originals and the locomotive incomplete I would have thought it an unpublished design.

I acquired a short piece of copper pipe, suitable for the making of a small boiler to run a twin cylinder engine at 5/16 bore.

I have found a formula for the barrel and am satisfied that it will suffice but can't find anything but rules of thumb for the end plates and a calculation for stay dimensions and pitches.

Does anyone have a source for plate thickness strength calculations?

A long time ago I purchased (from a well known online auction site) what was sold as a 3 1/2" gauge 0-4-0 chassis and drawings (which in the pictures looked like blue prints).

Members who have used online marketplaces will be familiar with the fact that many sellers (but not all) go to absolutely no effort to either check what they were selling or to describe it correctly.

What arrived was a 5" gauge 0-4-0 which did contain some blue prints but also contained some very good original drawings by S.F.H. Or as drawn s.F.h (except the last H whilst small in size was a capital.

The drawings have passed boiler inspection so I will complete the engine... but..

Does anyone know who S.F.H was, or indeed is?