reverse curve start
bent aluminium sheet over stump to set in place then shrunk edges to trap metal in the centre.
eventually worked shrunken centre out to the top and bottom edges.
A cheeky wheel
To even out, stretch and smooth the inner section of the reverse curve, I decided to see how an English wheel would affect the material. I swapped out the bottom wheel for another with a higher crown, the highest crown available as this is a small piece of metal so I wanted a minimal contact patch. After only a few light passes through the English wheel, the central arc was widened, smoothed and slightly more aligned. I began to work on stretching and forming the metal using various metal anvil-like objects that were scattered around the workshop. Got up to this stage when I was informed that there was staff CNC training so I had to leave. Will hammer out the final parts another day.
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