A lift hill, or chain hill, is often the initial upward-sloping section of track on a typical roller coaster that initially transports the roller coaster train to an elevated point or peak in the roller coaster ride. Upon reaching the peak, the train is then disengaged and propelled from the lift hill by gravity and allowed to coast throughout the rest of the roller coaster ride's circuit.
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 push the train upwards.
The familiar "clickity-clack" sound that occurs as roller coaster trains ascend 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. The anti-rollback device is a standard safety feature, typically consisting of a continuous, saw-toothed, section of metal, forming a linear ratchet.
Roller coaster trains are fitted with anti-rollback "dogs" which are essentially heavy-duty pieces of metal which fall and rest in each groove of the anti-rollback device on the track as the trains ascend the lift-hill. This makes the "clicking" sound and essentially allows the train to go upwards only, effectively preventing the train from rolling back down the hill should it ever encounter a power failure or broken chain.
Coffee producer has eye-opening experience: efficient and reliable lift trucks perk up the supply chain.(LIFT TRUCKS: Application Reports)
Oct 01, 2010; Camano Island Coffee Roasters receives, roasts and ships coffee direct to customers across the United States. To ensure...