LUNAR LANDER STAGE REQUIREMENTS BASED ON THE CIVIL NEEDS DATA BASE

This paper will examine the lunar lander stages that u_ll be necessary for the future expk)ration and development of the Moon. Lunar lander stage sizing wal be dis _ based on the projected lunar payloads listed in the Civil Needs Data Base. Factors that u_ll influence the lander stage design will be identified and discussed Some of these factors will he (1) lunar orbiting and lunar surface lander bases; (2) implications of _ect landing trajectories and landing from a parking or_n't; (3) implications of landing site and parking orbit; (4) implications of landing site and parking orbit selection; (5) the use of expendable and reusable lander stages; and (6)the descent/ascent trajectories. Data relating the lunar lander stage design requirements to each of the above factors and others u_ll be presented tn pararnetric form. These data will provtde useful design data that will he applicable to future mis_n model modifications and design studies. As a result of the findings of the National Commission on Space and the Space Leadership Report by Dr. Sally Ride, there is a renewed interest in lunar exploration. Many current lunar study activities indicate the great potential for both scientific and technological benefits from a sustained, sequential lunar exploration progam that would culminate in the utilization of lunar resources. The results of many of the current conceptual engineering studies depend greatly on the specific assumption