The sign accompanying the injector. It reads
F-1 Engine Injector Plate
This piece from one of the first-stage engines of Apollo 11's Saturn V rocket
from the bottom of the Atlantic Ocean in 2013.
The injector plate sprayed
liquid oxygen and kerosene fuel into the combustion chamber. The propellants
passed through the hundreds of small
holes visible on the plate. The baffles
protruding upward (bent by the force of the first stage crashing into the
ocean) helped regulate the flow of the hot gases during the 2 1/2 minutes of
44 in. (111.8 cm) diameter; 1,200 pounds (544.3 kg)
Transferred from NASA
There are actually 1,428 oxidizer orifices and 1,404 fuel orifices on the
injector, for a total of 2,832 propellant injection holes on the injector.