By contrast, the clothoid shape smoothes out the acceleration so riders speed safely along the interior of the loop. The secret is the loop`s changing radius, which controls the speed of the cars, ...

Many extreme roller coaster these days have vertical loops. Have you noticed that these loops are never circular? Why is this? They all, also, seem to have the same similar ‘inverted teardrop’ ...

WASHINGTON -- At the age of 74, retired roller coaster designer Werner Stengel still spends his days riding the latest loop-de-loops. "Trying to explain the thrill of a roller coaster to someone who ...

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