OKMO Microcosm Model M31 Vertical Steam Engine Single Cylinder with DIY Modifications

OKMO Microcosm Model M31 Vertical Steam Engine Single Cylinder with DIY Modifications
Posted by Jim on 06 Feb, 2025 18:58
OKMO Microcosm Model M31 Vertical Steam Engine Single Cylinder

First run on live steam of this beautiful brass casted vertical steam engine. Really happy with DIY Modifications that I did and the two timber plinths. Made lots of items using my metal lathe and milling machine. The condenser pot was made using three copper plumbing items cut down on the bandsaw, turned on the lathe and drilling and tapping on the milling machine. The inline lubricator needed a complete rebuild and needed to be silver brazed back together. Not sure if the lubricator was made by Stuarts in the U.K or not, I made a new screw top for it and knurled it and put an Australian Miniature Steam Models MSM turn wheel on.

https://youtu.be/lH-C38v6_1s

#1 Reply
Posted by St Paul Steam on 06 Feb, 2025 19:07
A marvelous plant Jim, I loved the column of steam coming up from your chuff pot. Stunning job of it mate 😊

#2 Reply
Posted by Jim on 06 Feb, 2025 20:46
Quote from: St Paul Steam on 06 Feb, 2025 19:07
A marvelous plant Jim, I loved the column of steam coming up from your chuff pot. Stunning job of it mate 😊

Thanks Bruce, its a really nice engine.
After its run in I'm looking forward to seeing how slow it will run and what its like running a Baker Fan.

#5 Reply
Posted by Stoker on 07 Feb, 2025 11:12
Yes Jim, those M31 verticals are truly fine engines, while the M30 twins may be even better. Can occasionally be gotten at almost embarrassingly cheap prices, though I don't see the low listing prices much anymore like I used to see.

I think mine would definitely benefit from a softer governor spring, and most certainly would run better with a load, which I think one of your beautiful Baker Fans would be perfect for that task!