Aero Fact: LOX/RP-1 vs LOX/LH2
Kerosene offers higher density and simpler handling; hydrogen provides higher Isp but larger volume and complexity.
By AircoreDynamics •
•
1 min read
Definition: RP-1 is dense and easier to handle; LH2 offers higher Isp but large volume and cryogenic complexity.
Physics insight: Propellant density drives tank size and structural ratios.
Example: Common: RP-1/LOX first stage with LH2/LOX upper stage.
Isp_LH2 > Isp_RP1; ρ_RP1 >> ρ_LH2
Rules of thumb: Include thermal management and ground ops costs.
Common pitfalls: Underestimating boil-off and insulation.
References: Sutton; NASA Cryogenics