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sketching a volute

Question asked by Tathan Jones on Oct 14, 2008
Latest reply on Oct 14, 2008 by Tathan Jones
Hi, n00b question but I can't figure it out

Can I start at say R30 and sketch a volute outwards to say R60 180degrees apart, with the radius increasing proportionally with angle? It's for a centrifugal water pump, same sort of shape as a turbo housing.

At the moment the only way I can do it is lots of points at calculated coords, then spline through them, I was hoping there was a button/technique for creating a tangent spline from one reference circle to another with a smoothly varying curvature.