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Stan Like most air/steam engines, swapping inlet and exhaust just changes the direction of rotation. Either way would probably work, but as I was thinking about this engine, it came to mind that someone had fabricated and fitted a neat little diffuser/muffler to the axial port on the valve...

This was intended as a parody on particle physics, not partisan politics. If it comes across as political, please delete it. Jerry

I'm not going to tell the whole story here. I'm sure you have already heard it. It is told in almost every culture in the world through out history. This not about the creation myth that is also universal but is about a later development. I'll just cut to the chapter that is later in the story...

Jim For members in good standing on HMEM you will always get a substantial discount by including the PROMO CODE "WTF" with all request. Jerry

Stan Ignore much of what I said. I'm going to sober up and try again tomorrow. The error? Air is supplied to the radial input, not the axial one. The valve is outside admission, not inside admission. I don't know what I was thinking. Everything else that I said is true except that the...

Simon, If you had just rebuilt your 16 cylinder Ferrari and it would not spin freely with the heads off, would you get an 8ft cheater bar and try to get it to move? I don't think so Tim. Same thing. If it is tight, you have to find out why. Jerry

Stan In spite of what I said earlier, it is hotter than blazes in Florida, and my shop air conditioner can't keep up with the afternoon heat when the shop roof looses the shade of the big laurel tree on the south of the shop, so I will entertain myself by thinking about this engine and valve...

Sure Stan. Gas prices are down and Florida daytime temps seldom exceed 95°F this time of year. Jerry

Stan One other point about the valve. The number and size of the holes through the web are of no significance. If you make them bigger or add more holes, you can see what is happening at the valve face better. Pick any piston and set it at TDC. With the valve cover off, look at the valve port...

Hi Stan I'm a little late to join in on this thread. I hope you don't mind if I comment on this valve design at this point. I have studied it and I have used it as a model on some of my wobbling engines with some variations in air flow and size. In essence this is no different than a slide...

Amen! I have very little self discipline. There are very few deadlines in my life and the only schedule that matters is 5 o'clock refreshments. Jerry

Those are very impressive machines but since I don't own a Pornograph, I was looking for something simpler or some method that could be adapted to an X2 sized machine. It would only have to work in one plane, no 3D is needed and only require a small DOC with multiple passes as required. Jerry

Greg Any error in the chuck jaws is resolved when the cylinder is turned it will be concentric with the spindle axis and the facing cut will be perpendicular to the spindle axis, HOWEVER, if the spindle axis is katywumpus (not parallel) to the ways, the turned cylinder will be very slightly...

Very useful topic and a very useful device. I made a pair a few years ago and the first thing they were used for was testing the squareness of the lathe (ways parallel to the spindle axis), which also verifies the accuracy of the squares. By placing two cylinders together on a flat surface with...

A little backpedaling and I'll show how the valve was made. The main cylinder rotates on cast iron bushings turning on a 1/4" polished steel shaft. The air enters one side of the standard, connects with a passage in the shaft, travels through the shaft to the valve port in the shaft. As the main...

Here it is, running, not perfect, but it is almost the first successful run. It actually ran a few minutes ago but I didn't have the camera set up. At the time of this video, it has actually run about one minute. http://www.youtube.com/v/8N0Z42wox8c?version=3&hl=en_US&rel=0 Before I...

When my shop time was all about wood, it was common practice to produce a curved edge on a workpiece using a router or a spindle shaper to follow a profile pattern, and I have seen profile pattern followers on a lathe. Is there an approved method to produce a regular, compound curve (see...

Good advice, John. I would hate to have my balls ejected! I think I am safe at any speed that I could hope to reach, but until I know for sure, I will stand to the side. These magnets are amazingly powerful and I have had to learn some new operating methods. The magnets CANNOT be put on the...

Here is a short update on this project. I was not sure how I was going to assemble this thing and get all of the cylinders aligned and connected. While I was pondering the many problems that I face, the FORCE took over and the thing assembled itself, really! I had to leave the shop soon after...

Jan That is looking good. I think your first crosshead design was better but that's just me. It would be nice to be able to see this design from different angles. I'm not familiar with Inventor. Can it export a 3D .pdf file like this cast elbow which was done with Alibre'. It will let you...