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That is a very nice casting ! Your riser located on the left has a very small gate into it, and so that gate solidified before the main casting fully solidified, and the remaining molten casting acted as the riser, and caused the shrinkage. Perhaps use two risers at a 45 degree angle, and make...

Its all coming back now. My dad was a big ham radio operator back in the 60's, and I recall him tuning into WWV, but I had not heard that reference for a very long time. Ham radio chat use to be a big deal. .

There were a few that occurred last night while you were sleeping. Life comes at you fast, you know (hypersonic speed and all that). Try to keep up. .

Welcome, glad to have you. .

Maybe I am thinking of another forum, or maybe it is a moderator thing. I am not sure which. .

That is good news. My nextdoor neighbor had both is knees done, and he went back to playing 18 holes of golf, walking and pulling an electric club holding bag. I had to stop running a few years ago; the pain got too bad. So far I have avoided the knee replacement. .

I think students should learn manual machining with a lathe and mill before they learn CNC and associated software/programming. Likewise, I think folks should make patterns manually from wood in the beginning. I asked one person who was making patterns for a model engine on ytube why they did...

I have been on a number of forums, including machining forums, three different casting forums, miscellaneous general hobby forums, etc., and it can be tricky to find people who are closely aligned with your interests. Some forums have terrible software, some have ok software, but still clunky...

The post I have seen about the V8 castings was made by member "sandcrab", on Alloy Avenue, under the title "1/3 Scale smallblock Chevy". Here is a link to a piece of it on the wayback machine...

Alloy Avenue was the casting forum that vanished. The owner was a reclusive guy, I think from New York. His website is still up, but don't attempt to purchase anything from this website; it will not work. https://backyardmetalcasting.com/ There was another backyard casting forum that somewhat...

Welcome, glad to have you. Pat J .

A follower is just something to support the backside of a 1-piece pattern, so you can ram up to the follower, which is at the parting line. A follower can be a board with a hole in it, like Jason shows above, or it can be 1/2 the pattern set into plaster, bondo, clay, or anything that will...

That is an outstanding iron casting to say the least ! .

Its an ohhh.......ahhhhhh moment when I see flywheel patterns like this. Maple spokes ? Very nice indeed. .

The Soule steam engine foundry/factory/museum has a lot of their old patterns, and the Speedy Twin patterns are made up into matchplates. You can make a matchplate by ramming a pattern in a mold, removing the pattern, inserting a dam inside the two mold halves to separate them, and then pouring...

It is really not easy to walk into a foundry these days to see how things are done. It is almost impossible to walk into any industrial site these days; they are locked down tighter than fort knox. And the modern foundries uses methods that can be radically different, such as 3D printed sand...

From the Navy Foundry Manual; the "False Cope Method", where an irregular part is rough molded to make a temporary cope, then a permanent drag mold is made, and finally a permanent cope mold made. Good for irregular shapes, broken parts that are used for patterns, etc. .

If you put a pattern in a flask, and fill the flask, ram the sand, etc., then you should flip the flask, and scoop down to the partline from the backside, since the chances of getting good compaction on the sand below the pattern are not that good. The Navy Foundry Manual decribes a "False Cope...

I saw the most cringy thing I have ever seen in a video the other day. I should have saved the link. The person very carefully takes a measurement with their digital vernier caliper, and then used the caliper to very forcefully scribe a piece of metal with the tips of the caliper jaws. Ouch ! .

I have made bound sand pattern halves, and I use snap flasks. So once the flask is removed, there needs to be something to index the cope with the drag exactly. There are several ways to do the indexing, but the way I do it is before I remove the flasks, but after the two mold haves have...