Earth Return Vehicle Reference Version 3.0 Mass Summary Habitat Element: 26,581 kg Life Support System: 4,661 kg Crew Accomm. + Consumables: 12,058 kg EVA equipment: 243 kg Comm/info management: 320 kg 30 kw PVA power system: 3,249 kg Thermal Control system: 550 kg Structure: 5,500 kg Science equipment: 600 kg Spares: 1,924 kg SUBTOTAL: 29,105 kg Excess consumables: -7,392 kg ERV MASS AT TEl: 27,042 kg TEl stage dry mass: 4,806 kg Propellant mass : 28,866 kg Earth return RCS propellant: 1,115 kg Aerobrake: 10,180 kg TOTAL TEI MASS : 61,829 kg TOTAL MOI MASS : 74,072 kg NTR Propulsion System: 23,400 kg TMI Propellant : 50,000 kg TOTAL INITIAL MASS: 147,472 kg