section_path: Design/Engine
section_name: Engine
paragraph_text: Engine
  
  Both stages are equipped with Merlin 1D rocket engines. Every Merlin engine produces 854 kN (192,000 lb) of thrust. They use a pyrophoric mixture of triethylaluminum - triethylborane (TEA-TEB) as an engine igniter.
  
  The booster stage has 9 engines, arranged in a configuration that SpaceX calls Octaweb. The second stage of the Falcon 9 has 1 short or regular nozzle, Merlin 1D Vacuum engine version.
  
  Falcon 9 is capable of losing up to 2 engines and still complete the mission by burning the remaining engines longer.
  
  Each Merlin rocket engine is controlled by three voting computers, each having 2 CPUs which constantly check the other 2 in the trio. The Merlin 1D engines can vector thrust to adjust trajectory.