Seven composite engines were designed for application to a reusable single-stage-to-orbit vehicle. The engine designs were variations of the supercharged ejector ramjet engine. The resulting performance, weight, and drawings of each engine form a data base for establishing a potential of this class of composite engine to various missions, including the single-stage-to-orbit application. The impact of advanced technology in the design of the critical fan turbine was established."NASA CR-2613."Performing organization report no.: S-1325."December 1975."Cover title.Includes bibliographical references (p. 69).Seven composite engines were designed for application to a reusable single-stage-to-orbit vehicle. The engine designs were variations of t...