Concrete should be troweled to a smooth even surface and be aged for at least 90 days. Expansion joints should be properly filled. Neutralize the surface of the concrete. Use either 1 part Muriatic Acid and 9 parts water or 1 part vinegar and 5 parts water to make a good neutralizing agent.
Cedar Pointâs Top Thrill Dragster relies on the power density of hydraulics. August 29, 2014 By Mary Gannon Leave a Comment. As it embarked on yet another one of its record-breaking, thrill-seeking rides, Cedar Point quickly turned to hydraulics, for the power density and precision control it offers.
Top Thrill Dragster, at Cedar Point, Sandusky, Ohio, is no exception. However, instead of relying on a chain or cable to laboriously pull the coaster up its first hill -â in this case, a 420-ft hill â Top Thrill Dragster relies on kinetic energy to propel coasters up its hill in mere seconds. Top Thrill Dragster accelerates coaster trains from zero to 120 mph in about 4 sec. At that speed, coasters have just enough kinetic energy to scale that monstrous hill. From there, gravity pulls the coaster down the other side of the hill, where the coaster once again reaches speeds of about 120 mph.