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If you like I can reference part dimensions on my engine; I assume they would scale.

My engine runs very well without rings and with less accuracy in diameter. Your fabrication method is cool.

I built this engine full size from casting 8 years ago. Here's the build thread. Joy's Valve Gear Horizontal Engine I made a SolidWorks model of the engine as well. Another user made a reduced model from bar stock and modeled it in Rhino. There are several articles in ME provided by...

When making an assembly, the initial part selected is fixed. Any motion in the assembly is relative to the initial part. However, when making assemblies from other assemblies, the included assembly needs to be marked flexible so that the base part can move relative to the other assemblies...

I don't design in 3D but rather convert 2D plans to 3D parts in order to check fits and dimensions, and then to output DXF files for CNC machining or STL files for 3D printing. That said, there's something to be said for using this technique on an existing plan set in order to learn 3D CAD. As...

With SolidWorks I just draw a random-sized rectangle and then dimension each side afterwards.

The ship was likely not intended to steam in reverse for very long, so cutoff was deemed unnecessary.

For current 2021-22 version I got an application received email on 12/21, paid the $20 online, and received download instructions on 12/24. Is the 2022-3 version available now?

Interesting to see the cutaway view. I'd always assumed there was one piston and a single rod. So it appears that each piston only sees stem from the outer side to push it towards the center, and that it's retracted by the external crank.

I suspect that the gear printed in Onyx fiber on my new Markforged printer would work well, as the material is about as strong as aluminum.

Great job.

I tend to enjoy the NAMES show more than CF as there's more to do in the area with better weather. I definitely preferred CF when it was in York. From Atlanta, airfare to Rapid City is quite expensive, and since I've visited Rapid City area in the past, the incentive for tourism is less.

I've seen one running at Cabin Fever.

Did you get the plans from Rich? His "build book" is impressively large.

Based on drawing, the critical settings are Y axis. Y0 is the centerline and can be found conventionally. Y-cutter is the cutter diameter minus the depth of cut of the teeth. Then position the cutter with X slightly forward (X+) of contact with the gear and Z slightly above the gear (Z-)...

I found some gears for a project here: Small Mechanical Components: Precision Gears, Timing Belts, Gear Assemblies, Timing Belt Pulleys, Couplings, Bearings and much more from SDP/SI

I assume polishing requires a complete disassembly.

Answer is 4, or ratio + 1 for integral ratios.

Here's a build thread from 10 years back of a Dake model. Potty Dake Engine

brain fart :eek: