Galloway Engine, Turned by Hand to show Operational Sequence

[@150flyer4]

I could watch that motion all day long!! One of my favorite things about live steam models is being able to see the moving parts.

[@JoesModelEngines]

Thanks for the comment and for your interest, it is definitely appreciated. Joe

[@southerlandstation]

Amazing

[@JoesModelEngines]

Thank you for your comment and your interest. It’s much appreciated. Joe

[@peteengard9966]

That's a lot of fine machining. Did you get castings or did you cast your own?

[@JoesModelEngines]

There are no castings , did you see the first video of the engine running? I explained it in the first video. It’s all made of bar stock. Thank you for your interest and your comment. Joe

[@Jan-ErikØiseth]

What an awesome build as a tribute to the engineers of the past, thanks a lot for sharing Joseph. Just a hypothetical question: What do you think about building it as a 4 cylinder double expansion engine, by mirroring the airpump on the other side of it and then using them as the second stage? Correctly sized and adapted of course. If the left cylinder is fed to the right airpump and vice versa, would that make for a somewhat correct timing of the steam? Any thoughts on the mechanical/linkage efficiency? Again, just hypothetical, and just for the mere fact that it would add another delightful layer of complexity to a wondrous little machine.

[@JoesModelEngines]

That’s a great question ,but this is a model of a historical engine and changing it would go against that.Thank you for your comment and your interest.Joe

[@Dave.w-ev9qn1962]

Thanks for the explanation! It makes sense now, it’s a fascinating engine. Have you ever built a model of a rotative beam engine running on the Cornish cycle?

[@JoesModelEngines]

I have not built anything like that. Mostly because of the fact that it can’t be run on air pressure as far as I know. I build mostly gas engines. I seldom build steam but I thought this model was extremely interesting because of the motion. This model was a design by Anthony Mount and published in a book Engineering in miniature. I thought about it for some time because it was an English design with BA thread bolts and quite heavy. I finally did build it in a 25% reduced size and changed it to SAE threads . All built up from bar stock. Thanks again for your input. Joe

[@Dave.w-ev9qn1962]

That’s interesting! Didn’t realise that engine came from over hear in England. Will have to look into that and see if he built any more. It’s a great engine for a display! I’ve seen Cornish engines at our steam rallies running on air, But probably rotative double acting ones. The return stoke was made by the weight of the pump rods in the shaft on pumping engines, so you would have back weight to make that model work. Thanks for the info!👍

[@JoesModelEngines]

Hi Dave, There is a casting set available for the engine, but it’s heavy. I think it is also from England. Your comments have made me think. I love building engines that have some wood in them. Cornish engines are made with a lot of ,wood especially the first ones. Have you ever seen plans for them. Joe