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Chris:Following along with great interest, this promises to be another good'un.You could combine several of your interests, here's a photo of a Marion draglineon a barge dredging the harbour in Halifax Nova Scotia in 1910... would provide enough depth of water for a submarine...Cheers, Joe
Given that it's difficult to make a small engine run slowly, the gear ratios may need to change from the prototype in order to have the shovel move in a realistic manner.
Neat stuff!! Pete
Hi Chris, amazing valve and port design. I don't know how you figured it out, let alone the original designers. I suppose it developed in stages.Could you make them by cutting plates matching the vertical slices, stacking, pinning for alignment and silver soldering them all together?MJM460
Chris, Could it be 3d printed then investment cast? Looking forward to seeing completed parts. Dave
I would expect that the cores and molds were made up of multiple, but simpler parts, and then glued together during the final mold assembly. There were/are recipes for making baked sand cores using not much more than flour, water, molasses and sand. The cores for modern inlet manifold passages and other complex parts are made up of many small parts glued together in a jig. This assembly is then placed in the mold, which forms the outside of the part, and the part cast in metal.If you want to get an appreciation for the art of sand casting, check out this one about 2-3 minutes into the video. https://www.youtube.com/watch?v=hRsYIiUxZeQDon