GreenTwin's latest activity
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GreenTwin reacted to marvin hedberg's post in the thread For Sale Morrison and Marvin mini Wilton Vice kit with
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"Those are some really fine-grained gray iron castings. I wonder if they are ductile iron? Sort of a lost-wax process look to them... -
I have never used glass as a flux with cast iron but I always use glass when melting brass. If you use clean cast iron there is not much...
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Mounted a removable electric motor so I can make bales without steaming up the tractor. https://photos.app.goo.gl/ym8EkMtFhXruNG4f9...
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Added a bell, now it's complete.
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GreenTwin reacted to minh-thanh's post in the thread Diesel engine : Kromhout Gardner 4LW 1940 with Like.
Hi All ! An update I'm back with my project. I'm planning to do the oil pump after testing the engine but I hate to take the engine...
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This was excellent thank you. Your narration was also very good. I followed along using Plasticity (Parasolid), which for fillets is...
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Hi, One year after the first start-up, the first flight took place: Finally there are 3 small SH (Just engines) carburettors with...
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Now I'm waiting for the right moment to do a test flight with an easy plane that doesn't risk much. The plane has a 2.50m wingspan. Bruno
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Some parts. I had started to make 2 of them. The second one is much less advanced because I wanted to make a different crankshaft for...
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Hello, I mentioned it in my presentation as a new member, here it is in more details. The design is totally personal but uses solutions...
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GreenTwin replied to the thread Question about lost PLA casting.Looking through my photos, I can't really find a good example of gassing in aluminum castings, but I recall having tiny pinholes in my...
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MT1 6 pos turret, 5/8" . This thing is well made and the lock up is TIGHT...
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GreenTwin replied to the thread Question about lost PLA casting.Aluminum will have tiny gas bubbles all through it if it is overheated and held at melt temperature for any length of time. These small...
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GreenTwin replied to the thread Question about lost PLA casting.Glass is not required as a cover on gray iron. Iron does not pick up gasses from the air, at least not enough to cause any gas bubbles...
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GreenTwin replied to the thread Question about lost PLA casting.I also recall having gas issues (no pun intended) with brass. Holding a metal at an elevated temperature often causes absorption of...