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Hi Tony, Thank you, but no apology necessary - I was not very clear in my original post. I have only seen the plans that are freely available, some museum archives and the Elmers collection!

Hi Tony, The problem is not the level of decimal places - it is the dimensional accuracy I was referring to with original plans - from my own experience it seems quite common practice for the original draughtspersons to set an accuracy level when dimensioning in 'inches' to 1/32, 1/64, 1/128 or...

Hi Paul, Coincidentally I am actually working through as many of the old imperial designs as I can, converting them to metric units, re-dimensioning to account for 'rounded-up' dimensions, modeling to an accuracy of 6 decimal places and finishing with a set of working drawings dimensioned to 3...

Hi Stan, Thank you - I suspected it may have been something to with soldering. Your reply has prompted another quick question - which Loctite would you normally use - I just had a quick look at the Loctite website and there must be about a dozen product variations for threadlocking and/or sealing?

Hi Tony, Thank you. Its actually the connection for a rod to an eccentric bracket (strap).

Excuse my lack of knowledge, but I have noted a few times references like "screwed 5 BA and sweated" - I wonder if someone can tell me what "sweated" means in this context??

Hi Tony, Thank you very much. before I posted I had read a paper written by a prominent engineer from the 'Society of Engineers' published in 1870 in which he discussed the various types of 'steam lubricators'. In this document is specific mention of marine engines that states "For such...

I came across this lubricator on plans for a marine engine. I wonder if someone could clarify how it is supposed to work? My understanding of displacement lubricators usually has the steam inlet pipe connected at the top, relying on small amounts of steam condensate to lift the level of the oil...

Hi Jason, Just noticed your edit. Interesting point about the caps crews - okay if I am creating these drawings, which I hope to make available at later date, should I be targeting the 'authentic' finish in the design or the 'new look' with cap screws? I should explain that the model...

Thank you all for your very prompt and detailed responses. The solutions for the piston rings and set screws are well described. The Cap Screws! During my research of model steam engines I have come across a few examples of washers used under the head of the Cap Screw, whilst I am conscious...

During the development of my steam engine plans many questions arise and I hope you don't mind if I bundle a few questions here? Question 1: Piston Rings - many plans refer to 'off the shelf' components for piston rings, but I don't seem to be able to find any information on suppliers and more...

Hi Frank, thank you - the job description was from my last job - which was in Canada. It is basically cad consultancy with the main difference being to develop a complete 3d cad solution for a company that considers all aspects of a multi-discipline engineering workflow including conceptual...

Hi Steve and thank you. I have some sample images on my blog at http://hught2006.spaces.live.com/ I also have some animations on youtube at http://www.youtube.com/user/HughT08 I primarily use Inventor for my work, which is an excellent 3d cad program but not so good with the rendering - I must...

Hi to all. I happened across this excellent forum whilst searching for plans of steam engines. I am a 3d cad strategist, with a background in structural engineering and design. I only recently developed an interest in steam engines when I was using a set of plans as a project to help beta test a...