Author Topic: Twin cylinder mill engine, slightly rusty.....  (Read 377 times)

Offline redhouseluv

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Twin cylinder mill engine, slightly rusty.....
« on: July 06, 2024, 04:11:28 PM »
Hello all

I just got this home and was wondering about:

- The make, model and age
- Features which may help ID it, the rounded box bed, the bearing mounts are 'different', has some square headed bolts
- May have had a governor, as there is grooved pulley with inline with a vacant hole which looks like it held something

This moment of madness is going to be a long term project and I was wondering about the best approach.

- The wooden base is rotten so that's for the bin
- It's seized solid, so was thinking of giving it a bath Evapo-Rust (complete immersion?), did consider Electrolysis, heard that's very bad for brass
- Once majority of rust is off then penetrating fluid on all bolts and moving parts

It looks a lot worse than it actually is and I'd like to think, with a lot of TLC, it could be returned to its former glory. Has anyone out there completed a similar project with an engine in a similar state? Any advice (apart from take it to the scrapyard) gratefully received.

Here are lots of pictures


« Last Edit: July 06, 2024, 10:10:01 PM by redhouseluv »
Best regards

Sanjay

Offline redhouseluv

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #1 on: July 06, 2024, 04:17:07 PM »
here's a couple more ......
Best regards

Sanjay

Offline Jasonb

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #2 on: July 06, 2024, 04:17:57 PM »
I've a couple of photos of that engine look like they were taken in 2012. I don't think we could put a make or maker on it then.

Also a similar style of engine.

You could certainly buy things like cylinder sets, crosshead guides and assorted other parts at the time and arrange them as you wanted, the likes of Stevens's Model Boat Yard did then around 1920
« Last Edit: July 06, 2024, 04:22:38 PM by Jasonb »

Offline Michael S.

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #3 on: July 06, 2024, 04:36:39 PM »
A very beautiful steam engine and its design is well over 100 years old.
I have also once taken apart a heavily rusted engine. I would spray all parts and connections several times with WD 40 and let it work for a while. You can then process the parts mechanically with brushes, but this won't completely remove the rust. If you don't want to paint the old engine, that's ok and everything will be well oiled. The piston rod would have to be replaced but you'll see that later.
If you want to treat the engine with paint you definitely have to do more. I used a paint in my restoration (Hammerite). This paint also holds up on rust.
It's all a matter of personal taste.

Michael

Offline redhouseluv

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #4 on: July 06, 2024, 05:00:58 PM »
I bought this from an elderly gentleman and it belonged to his even older friend who was worried when he wasn’t around it would end up being thrown out. He said it was found in a collapsed work shed in Redhill some time around 2000. Not only do I now feel obliged to, but really need/want to restore it to its former glory.

That's definitely the engine in the 1st picture, what a coincidence!

I wonder about the flat belt pulley on the opposite side to the grooved pulley is that a usual configuration?

So sounds like penetrating fluid first and removal of rust second, I'm in no rush, if its been knocking around for all these years a few more won't hurt

« Last Edit: July 06, 2024, 05:09:19 PM by redhouseluv »
Best regards

Sanjay

Offline Jasonb

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #5 on: July 06, 2024, 05:08:37 PM »
That photo was over towards reading so the right sort of area.

The smaller flat belt pully would most likely have been used if you wanted to drive something rather than running the belt off of the flywheel which would have been too slow for a dynamo or similar.

Offline redhouseluv

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #6 on: July 06, 2024, 05:20:13 PM »
I'd be really interested to see what is going inside of the 'valve box' on in the picture below; I copied the image from the second engine pic above. I imagine some some sort of valve/butterfly arrangement which is connected to the governor and controls the steam to both cylinders?

Is there a special name for that box, how does it work and are there any diagrams of what is inside?
Best regards

Sanjay

Offline crueby

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #7 on: July 06, 2024, 06:27:03 PM »
Its called a steam chest, with ports andassages leading to the ends of the cylinders. Each cylinder would have a sliding valve block that allows steam from the chest to go to one end of the cylinder while opening the other end of the cylinder to the exhaust pipe.


https://en.wikipedia.org/wiki/Slide_valve


Offline Jasonb

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #8 on: July 06, 2024, 06:37:54 PM »
I don't think there is anything special going on inside that valve chest except double what you would normally find in a single cylinder engine.

I would say that the builder has just made a single chest to keep a more compact design as the space between the two cylinders can be reduced. The two valve rods are all that can be seen entering it.

The long rod that I have arrowed would have been moved by the action of the governor but looks to have been disconnected at some time from a valve that regulated the flow of steam to be replaced by that unsightly hand valve.

« Last Edit: July 06, 2024, 06:42:23 PM by Jasonb »

Offline redhouseluv

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Re: Twin cylinder mill engine, slightly rusty.....
« Reply #9 on: July 06, 2024, 07:30:04 PM »
Okay got it, its a single unit containing both slide valves for both cylinders.

As I have individual slide valves already on each of the cylinders, if I wanted to put a governor back on the engine, I would need some sort of way of controlling the steam entering the single, jointly shared inlet port; requires some further thinking.......

Anyway, dreaming now, I'll get the rust off and get the thing operational before going down that particular rabbit hole!  :)
Best regards

Sanjay

 

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