Hybrid rocket motor development should be advanced to the point that it can be quantitatively evaluated in competition with solid and liquid bipropellant systems designed to directly comparable criteria. The Committee recognizes that the scramjet engines cannot be fully developed on the ground and must be tested in flight. It endorses such flight research as soon as the basic technology development is at a stage to make it worthwhile. The body of the report covers in some detail the background and reasoning leading to these principal recommendations. Additional recommendations are included in the report.
More detailed information is contained in the appendixes.