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Terry . That is an absolute beauty. The stand is just right as well. Love your radiator. Buchanan

I was introduced to cnc way into the project. It has its place but one requirement when I use it is that there will be no sign of cnc machining. All internal corners will be square. No cutter radius. It is in Australia but my client is in Chicago. It may go via England but completion is 2 to 3...

Here is a link to a webpage that gives a good overview of the clock . http://www.my-time-machines.net/astro_10-16.htm There is a video at the top of the page that shows most of the interesting bits. Buchanan

John , thank you, and to every body else that has posted compliments, thank you. I am afraid that I am also a mere mortal. What is required is a client or a patron to dream of a project like this and then find , stimulate and finance somebody to make it . Finally, break it down into...

Here is progress made in January. The website belongs to my client. He updates it monthly from progress photos and emails that I send him. :http://www.my-time-machines.net/astro_01-17.htm This section described is for the Sun Moon dial. From the dial you can read the following information ...

You could drill right through the casting and use a long screw and put a nut on the bottom with a lock nut as well. Then you don't have to tap anything. Buchanan

I thought I might post a link to a website showing the build of an astronomical clock for a client. I send him regular photos and then he compiles a monthly report, so if it is acceptable I will post the link every time his website is updated. It is not an engine but has cams, chains, gears...

If it is very important I will spark erode the thread in for you. But we need more information. What does it hold and what are the stresses and in what direction. Buchanan

Thanks Mark . Mine is up and running again.

The pressure angle is also the angle of the face of the tooth on a straight rack which has straight sided teeth.

Drill an oversize hole with a sharpened masonry drill.Any old oversize. Press and locktite in a soft steel plug and drill and tap the plug. The same kind of idea as Danalot, What does the screw hold? I have sparked threads with an adjustable eccentric rotating holder. It is a bit of a fiddle...

You could get somebody with an orbiting head on a EDM Machine to spark the thread. You just need a copper thread with the correct pitch but smaller diameter. They could also spark the hole to start with.

Love it Terry. Pipe bending can be a nightmare, your's look beautiful. Buchanan

Oh dear, what have I started. Terry, keep it like it is. It's your engine. Deryck

John. If it is true to scale I have absolutely no problem . If not, its Terry's engine and it is beautiful.I do not have an in depth knowledge of aircraft engines but I can understand you. I just assumed that the valve would have been a die casting. Thanks for the adjustment. Buchanan

Thank you very much, but not the reply I expected.

Sorry Terry. I did not explain myself properly. What I was trying to say was to make the bolt on block look like a separate part but make it look a little more like a casting itself. I am in complete admiration of your work in every way, what ever you do. Deryck

Absolutely fantastic! May I ask, with the greatest respect , Will you try to make the oil control block look like a casting. It would blend in with the the lost wax castings of the engine so much better .

Sorry my mess up. Try this link:www.ebay.com.au/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xmilling+machine+castings.TRS0&_nkw=milling+machine+castings&_sacat=0 Or google milling machine table castings. They are in Australia. ebay.com.au.

I posted the link as soon as I had listed them on ebay. I think the actual auction started that night. Sorry about that. The link works for me now.