Fig.2.5.2: 2-STAGE WINGED SPS LAUNCH VEHICLE [Source: 78/55] The landing weights are 934 tons for the booster and 453 tons for the orbiter including returned pay load of 63.5 tons. The operating characteristics are vertical take off and horizontal landing (VTOHL) for both stages. 1.2.5.4 The POTV (Personnel Orbit Transfer Vehicle ) Fig.2.5.3: PERSONNEL ORBIT TRANSFER VEHICLE (POTV) [Source: 78/551 The concept which has been selected for the reference system is a two (common) stage propulsion system with three attached modules, the supply module with supplies for 480 man months, the GEO passenger module for 160 passengers, and a flight con-
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