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You definitely got the steam punk look down.

We've got a forum thread for that!!! https://www.homemodelenginemachinist.com/threads/but-what-does-it-do-bring-it-on.23492/

The original Heron engine was a toy as well. The story goes that when Heron was explaining all the possibilities of the power of steam the response was muted. Not that they didn't believe them, but what would they do with all their slaves? ...Ved.

As per usual, when I get the engine to my liking, I'll post all design files, drawings, models, etc. on this website. ...Ved.

It's been some time since I've last posted about this engine. Quite simply, the remaining parts just weren't that interesting to document their machining. I've had to remake the following parts: (1) Bevel Gear, but that was anticipated. Both pistons/piston rods The cylinder heads are warped...

I recently installed a Grizzly T33081 head unit and slides on our Alliant milling machine at work to replace an ancient Accu-Rite that finally died over 40+ years of service. Considering the Grizzly head unit with the 5 micron 1000mm & 600mm slides was under $700, I was quite pleased with the...

Superman!

The Piston Rod Clevis was much more difficult that I anticipated. It's not that it's requiring any machining operations that I haven't done before, it's just that the part is small. Thinking about it, I made a "Faceplate" for my rotary table with some scrap roundstock. I made a boss to index...

The Base Plate should be simple. After all, it's mostly a rectangular plate with a bunch of holes drilled in it. It would've been simple if not for that my mill isn't big enough to machine the part in a single set up. As before with the Upper Plate. I have some 1/8" thick aluminum that's too...

Making the Cylinders: The two cylinders are very similar to each other and it would be redundant to show the manufacture of both. After squaring the block to size, I drilled out the holes for the cylinder head threads and the steam port: The cylinder has a .875" bore. I have a .875 reamer...

I made the crank bearing housings without any pictures thinking that the parts would be easy. In fact they were quite fiddly. The valve driveshaft bearing housing are smaller, but of a very similar design. The design requires three of these housings. Knowing how fiddly the crank bearing...

Thanks for posting the design. I would suggest that if you're going to supply 3D CAD models, post them in .STP format. .STL is for 3D printers and most CAD software that I've used doesn't really open up .stl files that well. RJC

The material I have for the upper and lower plate are sheets of 1/8" thick aluminum. The only method I have to cut them into manageable pieces is to cut the sheet with a Sawzall. A Sawzall certainly isn't the most accurate cutting method in the world. So a lot of the upper plate was just...

I recently saw a video on YouTube about the Napier Deltic engine. Fascinating.

Now to work on the walking beam structure. I clamped a length of 5/16 brass round into my V-blocks. After indicating into position, I drilled/spot faced per the print. The only precaution was to just start the drill and not drill through. I didn't want to drill into my Vee Blocks. Easy...

New day, continue on with the connecting rods. I had new gumption, so I decided to go ahead and properly radius the rod ends. After drilling/reaming the pivot points, I set up a pivot rod. From there I can set the end mill in position and rotate the part to get the radius. First I plunged...

Today was making the crankshaft end connecting rods. The ends of the rods are two different lengths of the same design so I was able to make both types of end with a single setup. I changed out the lathe with my four jaw and centered up some 1/2" square stock. The stock was then faced...

Sometimes a part is difficult not because of its design, but because of what material is available. The rod end seal caps I could've made from barstock and been done with it. But No!!!!! My ******* thought "I have some flatstock that I haven't used in years, I'll make that round!" (Bad idea...

The Main Bearing Housings are, like the stand ends, mostly decorative. They could've been made much simpler, but I wanted some frivolous details. There are four Main Bearing Housings so each operation was times four plus 1 for my prototype piece for a total of five. First I machined the outer...

Mayhugh: With your skill, this suggestion would be cake, but perhaps IC engines are becoming to easy/common for you. May I suggest a model of one of Watt's condensing steam engines, one with the sun-planet gearing. The joy would be knowing that this engine works entirely based on the...