Oh, good question - not a rocket scientist but this history seems to say that’s the case: https://history.nasa.gov/SP-4206/ch7.htm https://history.nasa.gov/SP-4

Oh, good question - not a rocket scientist but this history seems to say that’s the case: https://history.nasa.gov/SP-4206/ch7.htm https://history.nasa.gov/SP-4206/ch7.htm ”Liquid hydrogen was only one half as dense as kerosene. This density ratio indicated that, for the necessary propellant, an LH2 tank design would require a far larger tank volume than required for RP-1. The size would create unacceptable penalties in tank weight and aerodynamic design. So, RP-1 became the fuel.” (RP-1 And Jet A are almost identical.) In applications where cross-sectional area is an exponential factor (read: atmospheric flight), volume is significant!