Hyperboloid in one sheet and two sheets, combined into one model. The intersection of the sheets is the hyperbola. The hyperbola was modeled using these parametric equations: x(t)=sec(t) y(t)=tan(t) with 0<t<60 degreesPrinted on a Makerbot Replicator 2 with 10% infill, raft, and supports. Supports were only needed in very small localized areas near the base of the model.