Roller coasters may be vomit- and tear-inducing thrill machines, but they’re also fascinating examples complex physics at work. Getting a string of cars through a knot of drops, flips, rolls, and ...

I love rollercoasters. But the sunburn, long line, and puking, I can do without. Here’s a 1/87th scale Coney Island styled ride, at about 1 foot tall, for all the thrill of the ride without the…thrill ...