Kingda Ka Kingda Ka Kingda Ka is a steel accelerator roller coaster located at Six Flags Great Adventure in Jackson, New Jersey. It is the world's tallest roller coaster, the world's second fastest roller coaster, and was the second strata coaster ever built. It was built by Stakotra, a subcontractor to Intamin. Riders have to be at least tall in order to be able to get on the roller coaster. The train is launched by a hydraulic launch mechanism to in 3.5 seconds. At the end of the launch track, the train climbs the main top hat tower, reaching a height of
Kingda Ka tracks) to load simultaneously. When the signal to launch is given, the train rolls back slightly to engage the catch car, and the brakes on the launch track begin to retract. As the brake fins are retracting, a voice recording announces, "Arms down, head back, hold on!" Approximately five seconds later, the launch occurs. Kingda Ka's horn previously sounded before each launch, but it was silenced due to noise complaints from nearby residents; the horn now sounds only when Kingda Ka first launches after being idle for some time. When the train is in position, the hydraulic launch mechanism accelerates