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Excellent!!

Looks like the spark plugs and ignition box to me.

I might be spoiled because I am still employed so I get to use the machines at my employer’s shop on my own time to do my projects. I believe a Mill, lathe, small band saw are your basics. With them you can make your sander, polisher, and most of your tooling needs. Next I’d add a welder. gas...

I would think wether you have clearance in the joints or not you would need a holding fixture to keep everything in line while heating and cooling. just my $.02

A couple (3 or 4)pieces of pipe under the machine and you can roll the saw into place only lifting it enough to place or remove the pipes.

This is the product we use. I’m sure you could find the same or something similar in small quantities at MSC or mcmaster. Maybe even a free sample would be enough for a couple engines worth…

The machine shop I work in uses a water soluble coolant in our CNC mill that works very well. When the water evaporates out of the coolant overnight there is a residue left on the cast iron table or the tool steel vise/tooling. An oily film is left and we never have a rust issue. I’ll have to...

I have to agree with Steamchick. Honing gets rid of the ridges left by boring. Look at a bored or turned surface under a microscope, looks like a fine thread. Honing or lapping will take all the sharpness off the high points or smooth them completely if enough material is removed. Depending on...

I will grind by hand left handed teeth on the end of a solid hard shaft of appropriate size for broken screw removal( a little less than the tap drill size). Not really a drill but more of a flute-less left handed end mill. Been doing this for years and it works great. When using it I start with...

I'm wondering if the valve stem and the accompanying adjusting rod tappet assembly need a definitive separation. That's a lot of weight and leverage flopping around as they motion and try to seat... Maybe a guide for the lower assembly and the valve stem just butts against a rod end. Just my...

Has any progress been made on making tha Atkinson CAD drawing available? Thanks in advance.

Thanks, I have to finish a few loose ends on it then start another. Haven’t chosen the next subject yet but a few I’ve considered are a snow, a sideshaft hit or miss, or a vertical air cooled. Not looking to design it so depends on what i can find for plans I guess.

Here it is, the first lengthy run I've gotten so far. Kerzel model Hit n Miss 2x1 scale - YouTube

im trying to upload a video of the engine running. For now an older vid of the crank making process will have to do sorry from the techtard.

Hello everyone in the community. New, well seasoned, and everyone in between. I am a toolmaker by trade so have a wealth of knowledge to apply to the hobby. I got into the trade because I was fascinated with making things. 44+ years later I’m still cranking out parts for my employer and on my...

I have a bad shoulder and cranking the table up or down on my knee mill was becoming quite a chore. So I made an adapter for my cordless drill to mate it to the handle connection. Had to put three flats on the 1/2” shaft to prevent it from slipping in the chuck. Works great and I grin every time...