Noun
RP-1 (uncountable)
(astronautics) Initialism of rocket propellant 1. (a highly refined kerosene; usually used in combination with LOX)
One form of the fuel known as RP-1 is burned with liquid oxygen as rocket fuel. Source: Internet
The S-I first stage burned RP-1 with liquid oxygen (LOX) oxidizer in eight clustered Rocketdyne H-1 engines, to produce convert of thrust. Source: Internet
For instance the Saturn Vs used a lower stage powered by RP-1 (kerosene) and upper stages powered by LH2. Source: Internet