Wernher von Braun and Other people also had ideas for a rocket that would have showcased 8 F-1 engines in its to start with phase, similar to the Saturn C-8, enabling a direct ascent flight for the Moon. Other ideas for the Saturn V termed for using a Centaur https://low-power-mcu01098.isblog.net/little-known-facts-about-ambiq-singapore-49928939