Roulette (curve) application of this is that a square wheel could roll without bouncing on a road that is a matched series of catenary arcs. Roulette (curve) In the differential geometry of curves, a roulette is a kind of curve, generalizing cycloids, epicycloids, hypocycloids, trochoids, and involutes. Roughly speaking, a roulette is the curve described by a point (called the "generator" or "pole") attached to a given curve as that curve rolls without slipping, along a second given curve that is fixed. More precisely, given a curve attached to a plane which is moving so that the curve rolls, without slipping, along
Wheel of Death (Space Wheel) the Space Wheel. Some early versions were performed by a single artist and incorporated a counterbalance on the other end. Following fatal accidents, the apparatus fell out of favour for a time until it was re-introduced in the 1970s under the name "Wheel of Death". For its 2007 touring edition, Ringling Bros. started using the name Wheel of Steel, as the word "death" was not seen as family friendly from a public relations perspective. Noted artists who have performed on the wheel include Nik Wallenda, Elvin Bale and Bello Nock. The Wheel Of Death is also used on modern cruise