The number of pumps, accumulators, and turbines varies with the speed the coaster is designed to achieve. Kanonen (the world's slowest Accelerator Coaster), while now closed permanently (as of December 30, 2016), had a design speed of , one pump, one accumulator, and eight turbines. Kingda Ka (the world's second fastest roller coaster) has a design speed of , seven pumps, four accumulators, and 32 turbines. The system as a whole is capable of producing up to 20,800 horsepower (15.5 MW) for each launch, although a typical launch uses less than .