Mock ups and Models ORCHID CHAIR WITH HINGE April 8, 2017 Xiu Ming 2 Comments Orchid. The second layer of orchid is actually a foot rest. The third layer is the sheet that guides the movement. Tilting on CAD, I discovered that the curvature for the last piece appears too… G2. Followed up by changing the bottom curvature to tangent to pivot point. Corrected the base curvature to be able to tilt at wider angle. Tilt angle: 11.22 degrees, left and right.