What keeps a wooden roller coaster on the track?

Running wheels guide the coaster on the track. Friction wheels control lateral motion (movement to either side of the track). A final set of wheels keeps the coaster on the track even if it's inverted. Compressed air brakes stop the car as the ride ends.



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For a roller coaster, gravity pulls down on the cars and its riders with a constant force, whether they move uphill, downhill, or through a loop. The rigid steel tracks, together with gravity, provide the centripetal force needed to keep the cars on the arching path as they move through the loop.

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That said, wooden rides present their own set of safety challenges. If you don't look after wood carefully, it can rot. We fight against that by coating the tracks with weather-resistant wood stain.

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Gravity applies a constant downward force on the cars. The coaster tracks serve to channel this force — they control the way the coaster cars fall. If the tracks slope down, gravity pulls the front of the car toward the ground, so it accelerates.

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That's because the roller coaster loses energy to other forces as it does loop-the-loops, curves, and other hills along the way. These other forces eventually bring the roller coaster to a stop, albeit with some help from air brakes at the very end of the ride.

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Wooden tracks are held up by large, strong frames with crossed beams. These frames are supported by “bents”3 which support the structure. In roller coasters, bents are made of pairs of evenly-spaced boards attached to the main supports. These main supports are attached to concrete foundations on the ground.

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While there are some concerns about their safety, wooden roller coasters are generally considered to be just as safe as their steel counterparts. With proper maintenance and inspection, wooden roller coasters can provide years of fun and excitement for riders.

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Steel coasters far outnumber wooden ones, but purists and more casual park fans alike still love wooden coasters. Dating back to the late 1800s, even modern-day woodies have a retro feel.

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During the ride, the 14-year-old “slipped through the gap between the seat and harness,” according to the state report. It concluded that “the cause of the accident was that Tyre Sampson was not properly secured in the seat.” The autopsy report said Tyre died from blunt force trauma.

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Jetline Roller Coaster in Stockholm, Sweden One of the trains on the Jetline roller coaster derailed, partially coming off the tracks while carrying 14 people. Some passengers were thrown off the ride, with witnesses claiming one man had to hang onto the rail before being rescued.

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A day of adventure turned into a nightmare for amusement park riders in Canada on Saturday after a ride stopped suddenly, leaving passengers suspended upside down, 75 feet above the ground for almost half an hour.

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A halted train isn't immune to derailments, however. To guard against derailments, JR East has installed L-shaped metal parts on its train cars as a countermeasure. The parts are designed to hook the cars on the rails, thus preventing them from colliding with side walls.

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What gives the power of a locomotive to move so much weight? A modern railcar has a gross capacity of 286,000 lbs or 125.5 tons moving in trains consisting of 100 cars or more, yielding a total carrying capacity of 12,500 tons, an increase of over 181% in carrying capacity. It depends on the locomotive.

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Rollercoaster loops are most often not perfect circles – instead, they are teardrop-like in shape. This is because it takes a greater amount of acceleration to get the train around a perfectly circular loop.

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