Author Topic: Opus Proximum  (Read 2219 times)

Offline Rik Shaw

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Opus Proximum
« on: January 18, 2013, 03:09:24 PM »
I've already posted this on ME but here it is again.

A couple of months back I made contact with a bloke who had made a model steam engine and had offered it for sale. Normally I would not buy such an item but it had a huge flywheel and I cannot machine anything that size.

The engine design owes a lot to Stan Brays "Opus Proximum" but my engine is different enough for me to rename it "Opus Machina" (because it took me a long time to remake it!)

To cut a long story short, I paid the man for his engine but made a big mistake by not taking my reading specs with me. It was only later that day I was able to closely examine the engine with my proper specs on that I realised what a hopeless mess I had bought. It looked like it had been made by a blind chimpanzee. Some of the best finishes had been achieved with a hacksaw - yes, it was that bad!

So, over the last few months I have ripped it apart and re-machined parts that could be machined and made new parts that could not be re-machined.

The only thing I have not touched is the cylinder assembly - I hardly dare imagine what it looks like inside. Just to give you an idea though, the valve chest is secured with 4BA screws. Trouble is though, he'd stripped the threads on one of the holes - his solution? He super glued a 6BA screw in its place.

I have heard some horror stories about chaps buying others "works of art" but I never thought I would end up being a sucker as well.

Never mind though, it's kept me occupied over the last few months and doesn't look half bad now sitting on my desk.

This is a good example of the original finish before I started work.

This is the refurbed job.

It runs here:

« Last Edit: January 21, 2013, 10:41:20 PM by pistonsoup »

Offline b.lindsey

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Re: Opus Proximum
« Reply #1 on: January 18, 2013, 03:17:21 PM »
Nice job on the refurb!!  I guess the moral of the story is keep your specs with you at all times :)  Thanks for sharing sure seems to run well now!


Online zeeprogrammer

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Re: Opus Proximum
« Reply #2 on: January 18, 2013, 10:20:14 PM »
I'm thinking I'm glad you did forget your specs.
Otherwise, as you implied, you might not have picked it up.
Turns out to be a very worthwhile refurb.
Looks great!
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline gary.a.ayres

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Re: Opus Proximum
« Reply #3 on: November 11, 2019, 01:11:19 PM »
Turned out great. Fine looking result.

Offline scc

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Re: Opus Proximum
« Reply #4 on: November 11, 2019, 10:22:47 PM »