Millennium Force design and development phases of Millennium Force took place over five years. The first rumors that a new record-breaking roller coaster would be built at Cedar Point, which included speculation about a ten inversion roller coaster from Bolliger & Mabillard and an Arrow Dynamics MegaLooper, began circulating in early 1998. A roller coaster from D. H. Morgan Manufacturing was also rumored. On July 2, 1999, Cedar Fair Entertainment Company filed a trademark for the name Millennium Force, which raised more speculation about what the ride would be like. About a week later, the first track pieces were seen at the
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