RESULTS OF STUDIES FULLY REUSABLE WITH FLY-BACK BOOSTER WAS GREATER THAN 5.1B MANY CONFIGURATIONS WERE STUDIED (EXAMPLES) TURN AROUND TIME REQUIRED LANDING A WINGED VEHICLE ON A RUNWAY PAYLOAD DEPLOYMENT AND RETRIEVAL REQUIREMENT DETERMINED LOCATION OF ORBITER ON LAUNCH CONFIGURATIONRESULTS OF STUDIES • FULLY REUSABLE WITH FLY-BACK BOOSTER WAS GREATER THAN 5.1B. • MANY CONFIGURATIONS WERE STUDIED (EXAMPLES) • TURN AROUND TIME REQUIRED LANDING A WINGED VEHICLE ON A RUNWAY • PAYLOAD DEPLOYMENT AND RETRIEVAL REQUIREMENT DETERMINED LOCATION OF ORBITER ON LAUNCH CONFIGURATION 7