A linear motor is an electric motor that has had its stator and rotor "unrolled", thus, instead of producing a torque (rotation), it produces a linear force along its length. However, linear motors are not necessarily straight. Characteristically, a linear motor's active section has ends, whereas more conventional motors are arranged as a continuous loop.
A roller coaster is a type of amusement ride employing a form of elevated railroad track that carries passengers on a train through tight turns, steep slopes, and other elements usually designed to produce a thrilling experience. Trains consist of open cars connected in a single line, and the rides are often found in theme parks around the world. Roller coasters first appeared in the 17th century, and LaMarcus Adna Thompson obtained one of the first known patents for a roller coaster design in 1885, based on the Switchback Railway which opened a year earlier at Coney Island.
Kings Dominion is an amusement park in Doswell, Virginia, United States, twenty miles (30 km) north of Richmond and 75 miles (120 km) south of Washington, D.C. Owned and operated by Six Flags, the 280-acre (1.1 km2) park opened to the public on May 3, 1975, and features more than 60 rides, shows and attractions including 13 roller coasters and a 20-acre (8.1 ha) water park. Its name is derived from the name of its sister park, Kings Island near Cincinnati, and the nickname for the Commonwealth of Virginia, "Old Dominion."
A flying roller coaster is a type of roller coaster meant to simulate the sensations of flight by harnessing riders in a prone position during the duration of the ride. The roller coaster cars are suspended below the track, with riders secured such that their backs are parallel to the track.
The launched roller coaster is a type of roller coaster that initiates a ride with high amounts of acceleration via one or a series of linear induction motors (LIM), linear synchronous motors (LSM), catapults, tires, chains, or other mechanisms employing hydraulic or pneumatic power, along a launch track. This mode of acceleration powers many of the fastest roller coasters in the world.
S&S – Sansei Technologies is an American company known for its pneumatically powered amusement rides and roller coaster designing.
Do-Dodonpa (ド･ドドンパ), formerly known as Dodonpa (ドドンパ), was a steel roller coaster located at Fuji-Q Highland in Fujiyoshida, Yamanashi, Japan. Manufactured by S&S – Sansei Technologies, the launched coaster used compressed air to propel its trains. It opened on 21 December 2001 as the fastest roller coaster in the world with the fastest acceleration, reaching a top speed of 172 km/h (106.9 mph) in 1.8 seconds. The ride was refurbished in 2017, removing its top hat element in favor of a vertical loop, as well as increasing its speed and acceleration to 180 km/h (111.8 mph) in 1.56 seconds. In 2021, the ride was closed down indefinitely after multiple complaints of riders sustaining broken bones were raised. The ride's permanent closure was officially announced on 13 March 2024.
Batman & Robin: The Chiller was a dual-tracked, launched roller coaster located at Six Flags Great Adventure in Jackson Township, New Jersey. Designed by Premier Rides, the ride was themed to the 1997 film Batman & Robin.
Tatsu is a flying roller coaster designed by Bolliger & Mabillard at the Six Flags Magic Mountain amusement park located in Valencia, California, United States. Manufactured by Bolliger & Mabillard, it opened as the tallest, fastest, and longest flying coaster in the world on May 13, 2006. It became the park's seventeenth coaster, featuring a height of 170 feet (52 m), a track length of 3,602 feet (1,098 m), and a maximum speed of 62 mph (100 km/h). Tatsu also features the world's tallest pretzel loop and the only zero-gravity roll inversion on a flying coaster model. Nearly a decade later, The Flying Dinosaur opened at Universal Studios Japan in 2016, breaking Tatsu's length record and matching its speed. In its debut season, Tatsu was ranked 40th among steel coasters in the annual Golden Ticket Awards from Amusement Today, peaking with a rank of 28 in 2012.
Hypersonic XLC was a roller coaster located at Kings Dominion in Doswell, Virginia. Hypersonic was built by S&S Worldwide, a company specializing in air-powered rides, and was the first compressed air launch coaster in the world. Hypersonic was S&S Worldwide's actual prototype for an air-launched coaster, called Thrust Air 2000.
Dominator is a floorless roller coaster located at Kings Dominion amusement park in Doswell, Virginia. Built by Bolliger & Mabillard, it originally opened in 2000 as Batman: Knight Flight at Six Flags Ohio, in Aurora, Ohio. It was given its current name when Cedar Fair purchased the Ohio park in 2004. However, following Six Flags Ohio ’s eventual permanent closure in 2007, the coaster was relocated to Kings Dominion, where it reopened on May 24, 2008. Dominator is located fairly close to the park’s main entry plaza, in the area known as International Street.
Volcano: The Blast Coaster, or simply Volcano, was an inverted launched roller coaster located at Kings Dominion in Doswell, Virginia, United States. Designed by Werner Stengel, it was the first launched roller coaster manufactured by Intamin and the first of its kind in the world to be inverted. Its launch mechanism utilized linear induction motor (LIM) technology. After a series of delays, Volcano opened to the public on August 3, 1998. A portion of the ride was enclosed inside an artificial mountain, constructed in 1979, which previously housed other attractions. Following nearly two decades of operation, Volcano abruptly closed a few weeks into the 2018 season, and the closure became permanent during the following offseason. In 2024, Rapterra, a launched wing coaster, was announced to replace Volcano.
The Joker's Jinx is a steel roller coaster at Six Flags America in Prince George's County, Maryland. The ride utilizes linear induction motor technology to launch the train from 0 to 60 mph (97 km/h) in just over three seconds.
Desperado is a steel roller coaster located at Buffalo Bill's Hotel and Casino in Primm, Nevada, United States, a part of the Primm Valley Resorts complex, straddling the state borders of California and Nevada. Designed by Arrow Dynamics and fabricated by Intermountain Lift, Inc., Desperado was one of the tallest roller coasters in the world when it opened in 1994, being listed by the Guinness Book of Records as the world's tallest roller coaster. A hyper coaster, Desperado reaches a height of 209 feet (64 m), featuring a 225-foot (69 m) drop, and is ranked as the seventh longest coaster in the world, featuring a track length of 5,843 feet (1,781 m). It also is among the fastest hyper coasters, attaining a maximum speed of 80 mph (130 km/h), with riders experiencing up to 4 G's.
Poltergeist is a steel roller coaster located at Six Flags Fiesta Texas in San Antonio, Texas. Designed by Werner Stengel and manufactured by Premier Rides, the roller coaster opened to the public on May 28, 1999. Its track was fabricated by Dynamic Structures and Intermountain Lift, Inc.
Roller coaster amusement rides have origins back to ice slides constructed in 18th-century Russia. Early technology featured sleds or wheeled carts that were sent down hills of snow reinforced by wooden supports. The technology evolved in the 19th century to feature railroad track using wheeled cars that were securely locked to the track. Newer innovations emerged in the early 20th century with side friction and underfriction technologies to allow for greater speeds and sharper turns. By the mid-to-late 20th century, these elements intensified with the introduction of steel roller coaster designs and the ability to invert riders.
King Cobra was a stand-up roller coaster located at Kings Island in Mason, Ohio. Manufactured by TOGO, the roller coaster operated from 1984 to 2001, and it was the first in the world to be designed from the ground up as a stand-up configuration. Other stand-up coasters that preceded King Cobra were sit-down models later modified to accommodate stand-up trains.
Pantherian is a steel roller coaster located at Kings Dominion in Doswell, Virginia, United States. The ride was manufactured by Intamin and opened to the public on April 2, 2010. Originally themed to racing, the coaster was originally named after the late NASCAR driver Dale Earnhardt, who was commonly known as "The Intimidator". It is located in the Jungle X-Pedition section of the park near Anaconda on the former site of the Safari Monorail ride. Standing at 305 feet (93 m) tall and reaching speeds up to 90 mph (145 km/h), it is the second giga coaster to be built in North America, following Millennium Force at Cedar Point. The $25-million investment was the most expensive of any ride in park history and the 14th coaster to debut at the park.
Mr. Freeze is a launched shuttle roller coaster located at Six Flags Over Texas in Arlington, Texas, with another installation known as Mr. Freeze: Reverse Blast at Six Flags St. Louis in Eureka, Missouri. The steel coasters feature a linear induction motor (LIM) launch system that accelerate riders from 0–70 mph (0–113 km/h) in 3.8 seconds. The two installations are mirror images of one another and are themed to the famous Batman villain Mr. Freeze. Originally, they were themed after the 1997 film Batman & Robin prior to a conversion in 2012 to operate backward. The Over Texas version returned to forward operation in 2022, but in July 2023, it started operating with one train launching backward and one train launching forward to offer different experiences.
Tumbili is a steel roller coaster at Kings Dominion in Doswell, Virginia, United States. Announced in August 2021, the 4D Free Spin model is manufactured by S&S – Sansei Technologies and opened on March 12, 2022. It is located within Jungle X-Pedition, a newly-themed section of the park formerly known as Safari Village. The ride takes its name from the Swahili word for "monkey."
