A preliminary trade-off may be made by comparing crew transportation costs to added costs for extra shielding and structure for the larger habitat. This presumes that crew provisions costs will not change from one alternative to the other. In order to develop cost trade-off data, a preliminary configuration was developed for a LEO-GEO passenger module. The module was sized to be delivered to orbit by a space shuttle and capable of transporting 75 passengers. The configuration is shown in Fig. 1; a preliminary mass statement is given in Table 1. From various studies of orbit transfer vehicle (OTVs), it was estimated that the vehicle mass fraction would be about 0.93 and the velocity increment each way (LEO to GEO; GEO to LEO) about 4350 m/s. The hydrogen-oxygen engines of the TABLE 1 75- PASSENGER LEO-GEO CREW MODULE MASSES IN kg
RkJQdWJsaXNoZXIy MTU5NjU0Mg==