Documents / Report
This final report, dated September 10, 1996, was prepared by the Research Triangle Institute for the Department of the Air Force's 45th and 30th Space Wing safety offices. Titled Modeling Unlikely Space-Booster Failures in Risk Calculations, it shows how rare Mode-5 failures, in which a rocket veers well off its intended flight line, are modeled in the DAMP risk-analysis program. An appendix lists Atlas, Delta, Titan and Thor launch and failure histories through August 1996.
From the source:Release of 2026-05-08 Incident: 9/10/96, N/A. This report describes the Modeling of Unlikely Space-Booster Failures in Risk Calculations, documenting historical launch failure modes and recommending corrective actions to address them using novel modelling techniques.
“Titan II”13 pages
Figure 24 shows the percentages of malfunction-turn impacts in 5° sectors for no
breakup and for breakup qa's of 20,000, 10,000, and 5,000 deg-lb/ft2. For B = 1,000,
theoretical Mode-5 impacts are also plotted using best-fit values of A. This value of B
was chosen since it is currently used by-RTI in making launch-area risk studies for the
45th Space Wing. In the sectors from ±80° to ±180°, where most of the population
centers are located, fairly good data fits were possible for all breakup qa's except 5,000
deg-lb/ft2. No value of A could be found to produce a good fit with B = 1,000. The
bottom plot in Figure 25 shows that an excellent fit between malfunction-turn and
theoretical data is possible for qa = 5,000 deg-lb/ft2 if a different choice of Bis made.
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~ l l ! ~ / ~ l
0.01 0 20 40 60 80 100 120 140 160 180
Angle From Flight Path (deg)
Figure 24. Delta-GEM Simulation Results with B = 1,000
9/10/96 62 RTI Not linked to a story yet.
Report, from the pursue collection. The PDF is mirrored here; the original link is above. 181 pages are in the text index: search them above, or from the library's search.