Recovered from ocean bottom, the Apollo space program's Saturn 5 rocket's F-1 engines injector sprayed fuel and oxidizer into the thrust chamberwhere they ignited. The hundreds of tiny holes on this injector are arrayed to provide a precise mix of fuel and oxidizer, while the baffles (ridges) reduce fluctuations in engine pressure helping to ensure a stable burn.
The injector sprayed over 5,500 pounds of fuel and oxidizer into the chamber every second which produced 1.5 million pounds of thrust when ignited.
The F-1 engines were loud enough to break windows miles away. Up close, the noise damaged the engines themselves. It took over 2,000 tests between 1962 and 1966 to achieve the intricate pattern of holes and baffles to manage the damaging shock waves.
