Beginning at the top, there is the crew access arm (partially constructed using Lego roller coaster track for gantry lattice ...

It's perhaps this portal to another world that makes games like Rollercoaster Tycoon so popular (or launches LEGO ... ordinary roller coasters, the train stays in line with the track ...

[Jon Mendenhall] fixed this deficiency by designing a model roller coaster that accurately simulates a full-sized ride. The track and cart are all made of 3D printed pieces, which altogether took ...