October 20, 20214 yr Hello all! Just thought I would share my recent acquisitions- a 4ft cone, picked up for a steal at 75$usd... Small Crack at the top of the tong slot, but still a serviceable tool!
October 20, 20214 yr Very nice! I don't remember seeing one with tabs for bolting it down; interesting detail.
October 20, 20214 yr Author JHCC, I'm pleased that mine has that feature- I'm thinking of temporarily bolting it to a wood frame- then I can step on the wood to keep the cone stable. Once I decide on a place, I may anchor it to the concrete. The cone wasn't really for sale- it was in a corner of a photo of an anvil for sale- When I messaged the gentleman, he said 75- I figured he must have left off a zero, but lo and behold, the best purchase I've made in a while!
October 20, 20214 yr If you make the platform round, then you can roll it to different locations as you try out different layouts.
October 20, 20214 yr Author That's a good idea to make it round- the cone itself is hollow, so it's not as heavy as I would have expected- I estimate less than 70lbs.
October 20, 20214 yr One trick that I have not yet tried myself is using the mandrel on the diagonal for long curves. There's a good photo of this in "The Art and Craft of the Blacksmith" by Robert Thomas, but I can't find my copy at the moment.
October 20, 20214 yr Author Funny you should mention that- I'm racking my brain to try and figure out the equation for making scroll forms on the cone- make them spiral and then flatten- but have to pull out my golden ratio cheat sheet to find out how many inches in between each spiral...
October 20, 20214 yr Author I did not, but will now be saving for use! I haven't done a whole lot of spirals, but it is something that I've wanted to do since a university math class in 2014 where we spent 6 weeks on the Golden spirals
October 20, 20214 yr As I note in one of the comments on that thread: Quote For the golden spiral, the growth factor is φ, the golden ratio; that is to say, the length of the radius increases by a factor of φ (roughly 1.618033) for every quarter turn. You can generate a golden spiral using this method by setting the protractor at 17° from perpendicular rather than the 5° shown in the video. I mentioned this in the video, but I referred to it as the Fibonacci spiral rather than the golden spiral. Strictly speaking, a Fibonacci spiral is not 100% identical with the golden spiral, but it’s a pretty close approximation. You create a Fibonacci spiral by combining a sequence of quarter circles with radii equaling the numbers in the Fibonacci sequence: 1, 2, 3, 5, 8, 13, etc. Because the ratio of adjacent Fibonacci numbers approaches φ the closer you get to infinity, the closer a Fibonacci spiral will be to a golden spiral the farther out you draw it.
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