TABLE 5.1 RBS Development Risks in Perceived Order of Criticality

Development Risk Section In Which Addressed
1. Rocketback maneuver Section 3.3
2. Hydrocarbon engine using oxygen-rich, staged combustion cycle Section 3.2
3. Upper-stage separation Section 3.6
4. Adaptive guidance and control (AG&C) Section 3.5
5. Integrated vehicle health management (IVHM) Section 3.4
6. Techniques to enable rapid ground processing Appendix F


FIGURE 5.1 Committee’s proposed RBS development risk reduction phases. NOTE: AGN&C, adaptive guidance navigation and control; CDR, critical design review; Fab & Assay, fabrication and assembly; IVHM, integrated vehicle health management; PDR, preliminary design review; Prod & Ops, production and operations; and RB Demo, reusable booster demonstrator.

5.1.1 AG&C Development Phase

Development of adaptive guidance and control (AG&C) capability is critical for supporting the RBS Pathfinder. This technology must be sufficiently mature for incorporation into the first Pathfinder flight to demonstrate the return-to-launch-site (RTLS) rocketback maneuver plus glideback and landing. Accomplishment of this would partially retire Risk 4 in Table 5.1. If this technology is not ready, it will delay the first Pathfinder flight and could jeopardize the RBS program. Extensive integrated testing of AG&C, combined with Integrated Vehicle Health Management (IVHM) and booster actuators in a simulation laboratory, is essential in developing booster flight

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