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andrewm.hill
Aug 17, 2017

Are there any Metric Steam Engine plans to build from?

6 comments

Havent seen anyone building steam engines using metric measurements on Youtube is it possible to get hold of metric plans?

Noisy Andrew
Aug 18, 2017

Yeah, working in fractions of an inch is super baffling if you've only ever used millimetres.

davidcurtis021
Aug 18, 2017

i love imperial measurement and find no difficulty converting from imperial to metric. An easy workaround for converting is to take your fraction multiply 25.4 representing millimeters divide by the the bottom number, the numerator then mulipy that answer by the top, the denominator.

 

example 1. 1/2 inch = 25.4 divide by 2 = 12.7 mulipy by 1 which = 12.7

example 2. 3/8 inch = 25.4 divide by 8 = 3,175 multiply by 3 which = 9.525

best to familiarize with this rather than fight against it as by definition steam is a bygone technology with nearly all documentation recorded in the nomenclature of the time. so if you prefer metric conversion is a must know how 1

andrewm.hill
Aug 19, 2017

As I am in my mid 50s and an engineer I dont have a problem with either imperial or metric but most new lathes have the feeds and and tailstock graduated in millimetres, so why introduce a conversion (and the possibility of a mistake) if you dont need to?

I expect that it would be difficult to buy metric pipe fittings though and making adaptors or new for everything would be a pain.

stephen.wylie01
Aug 20, 2017

Work when you can in both Metric & Imperial, things like pipe and fittings don't translate to Metric easily. In addition to the formula for conversion as mentioned by David I prefer 3/8 = 3 divided by 8 = 0.375" x 25.4 = 9.525mm. That way I have both metric and imperial measurements to work with. Hope it helps

ray.soltra
Aug 22, 2017

Happily agree with others on converting imperial to metric and vice versus. I was bought up with it, perhaps an age thing!

 

I have seen a Stuart D10 built from castings to metric measurements, nice old German guy. When I asked why he did that he said he converted the Stuart standard drawings to metric because he only had metric tooling and threads.

 

If you want plans and a kit in metric, I suggest you look at Bengs Modelbau who have a good range of engines at sensible prices.

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