The Swarm roller coaster (ThorpePark.com)

A theme park in London is set to debut a powerful new winged roller coaster this month, but only after first figuring out how not to dismember its riders. Time reports that Thorpe Park has been conducting test runs of its new coaster, the Swarm, even enlisting fighter pilots who described the ride as "gut-wrenching."

The self-described "flight through apocalyptic devastation on Europe's tallest winged rollercoaster" propels up to 28 riders at a time with their arms and legs dangling freely at 62 miles per hour and includes trips through an inverted 127-foot drop and several close encounters with walled structures that are designed to make passengers feel like they are about to crash.

[Zero-gravity roller coaster could bring weightless thrills to Earth]

The ride's designers ran some test runs with crash test dummies, leaving many shocked when the dummies returned from the experience missing arms and legs. A team of former British fighter pilots were then brought in as the coaster's preparation neared completion. Mark Cutmore, team leader ofthe Blades, a stunt pilot organization, told the Metro: "I am a self-confessed adrenaline junkie, but even as a pilot used to G-force there were some gut-wrenching moments, and I have to admit the near miss element is eye-watering -- you really do feel as if you are going to crash into the structures."

You can watch a simulated video of the Swarm here:

Winged roller coasters have been gaining popularity in recent years, but may be trumped by one California designer's plans to create the world's first "zero-gravity" coaster, which would imitate the simulators that NASA uses to train its astronauts.