Lift Hill

A lift hill, or chain hill, is an upward-sloping section of track on a roller coaster on which the roller coaster train is mechanically propelled to an elevated point or peak in the track. Upon reaching the peak, the train is then propelled from the peak by gravity and is usually allowed to coast throughout the rest of the roller coaster ride's circuit on its own inertia, including most or all of the remaining uphill sections. The initial upward-sloping section of a roller coaster track is usually a lift hill, as the train typically begins a ride with little speed; though some coasters have raised stations that permit an initial drop without a lift hill. Although uncommon, some tracks also contain multiple lift hills.

Lift hills usually propel the train to the top of the ride via one of two methods: a chain lift involving a long, continuous chain which trains hook on to and are carried to the top; or a drive tire system in which multiple motorized tires (known as friction wheels) push the train upwards. A typical chain lift consists of a heavy piece of metal called a chain dog, which is mounted onto the underside of one of the cars which make up the train. This is in place to line up with the chain on the lift hill.

The chain travels through a steel trough, and is normally powered by one or more motors which are positioned under the lift hill. Chain dogs underneath each train are engaged by the chain and the train is pulled up the lift. Anti-rollback dogs engage a rack (ratcheted track) alongside the chain to prevent the train from descending the lift hill. At the crest of the lift, the chain wraps around a gear wheel where it begins its return to the bottom of the lift; the train is continually pulled along until gravity takes over and it accelerates downhill. The spring-loaded chain and anti-rollback dogs will disengage themselves as this occurs.

Read more about Lift Hill:  Cable Lift, Tilt Lift/thrill Lift Section, Elevator Lift, Ferris Wheel Lift, Anti-rollback Device

Other articles related to "lift hill, hill, lift, hills, lift hills":

Loch Ness Monster (roller Coaster) - Layout
... Monster!" After departing from the station, the train reaches the 130-foot (40 m) lift hill with a small and tight turn (with views of Apollo's Chariot's ... A large upward hill crosses over the park's 'Land of the Dragons' and trim brakes bring riders to the first of the two interlocking loops ... of the helix a small brake run slows the train to ascend a smaller second lift hill ...
Twister II - Layout - Ride Experience
... railroad tracks, the track makes a right hand turn to the 100-foot-tall (30 m) lift hill ... From the lift hill, riders can view other rides at the park, as well as the Downtown Denver skyline ... Leaving the lift hill, trains snake around a swooping 10-foot (3.0 m) drop, mimicking the drop on the original Mister Twister ...
Space Mountain (Disneyland) - Experience - Rockin' Space Mountain
... While looking up the second lift hill, the spiral galaxy is no longer in place, but instead riders see a sun going nova ... Finally, once riders crest the lift, the sun explodes ... Ground" at the bottom of the third lift hill ...
Shivering Timbers (roller Coaster) - Ride Layout and Experience
... left turn out of the station and on to the 122 ft (37.2 m) lift hill ... At the base of the lift hill, the train reaches its maximum speed of 57 mph (91.7 km/h) ... Following the lift hill are two camelback hills, the first being 100 ft (30.5 m) tall, and the second being 95 ft (29 m) tall ...
Lift Hill - Anti-rollback Device
... The familiar "click-clack" sound that occurs as roller coaster train ascends the lift hill is not caused by the chain itself ... The cause for this noise is actually a safety device used on lift hills -- the anti-rollback device ... device on the track as the trains ascend the lift-hill ...

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