ToughSF
Full paper on the Nuclear Wave Rotor Bi-Modal Propulsion concept: https://faculty.eng.ufl.edu/aprg/wp-content/uploads/sites/130/2024/03/Nuclear_Wave_Rotor_Bi_Modal_Cycle_for_In_Space_Propulsion___2023_AIAA_SciTech-c.pdf A wave rotor uses shockwaves to compress the exhaust of a nuclear thermal rocket to 4765 K, achieving 1430s Isp at 2.27 kW/kg, or turn a generator to feed 3000s Isp thrusters at 0.47 kW/kg.
