Table VI. Mars surface exploration mission—nuclear electric propulsion (NEP) Mars evolution mission #2 (manned)—NEP Parametric sizing of stages, brakes Status date: Jan 26, 1989 Orbital sequential weights/performance Trans Mars injection stage—NEP Isp (sec): MPS: 8150.0 RCS: 220.0 B/O rate (kg/day): 0.0 Reserves (%): MPS: 2 RCS: 10 Inerts: TEIS: 0 Stage: 89 062 (Propuls only) Brake: 0 Tankset: 0 MPV: 52 571 MCSV: 199 997 MCL: 94 497 Total Mars P/L: 347066 Sequential weight Delta V (M/S) Time MPS fluids RCS Mission event MPS RCS days boiloff Nominal fluids other kg lb Leo departure 539234 1 118 796 MPS earth escape 7194 0 534 0 -46416 0 -46416 102329 MPS Mars transit 5600 0 370 0 -33 348 0 -33 348 73 519 Detach MCSV 0 0 0 0 0 0 -199 997 -199 997 -440 914 Detach MCL 0 0 0 0 0 0 -94497 -94497 208329 Mars arrival weight 16 4975 363 704 MPS Mars capture 1980 0 80 0 -4037 0 -4037 -8899 On-orbit staytime 0 0 365 0 0 0 0 0 MPS Mars escape 1980 0 80 0 -3938 0 -3938 -8682 MPS earth transit 5500 0 464 0 -10441 0 -10441 -23017 MPS lunar node rendezvous 1600 0 0 0 —2905 0 —2905 —6404 Lunar arrival weight 143 655 316 701 Less MPV 0 0 0 0 0 0 -52571 -52571 115898 MPS reserves 0 0 0 0 —2022 2022 4457 End of mission, excluding reserves 89062 196 346 Total 23 854 0 1893 0 0.0 -101084 0 0 -349 087 Fluid reserves —2022 0 Total usable fluid weight—kg Total usable fluid weight—lb -103 106 0 -227 307 0
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