Table IV. Mars surface exploration mission—-chemical propulsion Mars evolution mission #2 (manned)—-chemical Parametric sizing of stages, brakes Status date: Jan 26, 1989 Orbital sequential weights/performance Trans Mars injection stage—chemical I (sec): MPS: 460.0 RCS: 220.0 B/O rate (kg/day): 131.6 Reserves (%): MPS: 2 RCS: 10 Stage: 51 874 (Propulsion only) MPV: 120472 MCSV: 177 875 MCL: 89 975 Total Mars P/L: 388 422 Sequential weight Delta V (M/S) Time MPS fluids RCS — Mission event MPS RCS days boiloff Nominal fluids other kg lb Leo departure 1070427 2 359 863 MPS earth escape 3800 0 5 -658 -617130 0 -617789 -1 361 977 Detach Mars piloted vehicle 0 0 0 0 0 0 -120 572 -120 572 -265812 Detach MCSV 0 0 0 0 0 0 -177 875 -177 875 -392144 Detach MCL 0 0 0 0 0 0 -89 975 -89 975 -198 358 MPS reserves 0 0 0 0 -12 343 -12 343 -27211 End of mission, excluding reserves 51874 114 362 Total 3880 0 5 0 685 -617130 0 0 -400 764 Fluid reserves -123 343 0 Total usable fluid weight—kg -630131 | o 1 Total usable fluid weight—lb -1389187| 1___ 0___ 1 Continued on p. 297
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