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.
“R.G.”2 pages
The five values of B and the corresponding best-fit values of A used to compute the Mode-5 distributions shown in Figure 9 through Figure 13 are tabulated in Table 20. It is apparent that the value of A is dependent on both qcx. and B. In general, if a larger value of B is selected, a larger value of A is required to effect a fit with the random- attitude-tum data. On the other hand, if the breakup qcx. is increased, the required value of A must be decreased. Only qcx. is critical since, as shown later, any value of B, together with its corresponding value of A, can be used in the launch-area risk computations if significant targets do not lie within ±80° of the flight line. Table 20. Shaping Constants for Atlas IIAS Breakup qcx. (deg-lb/ft2) B A none 1,000 1.90 20,000 2.75 14,000 * 3.00* 10,000 3.20 5,000 3.45 none 50,000 3.15 20,000 4.10 10,000 4.50 5,000 4.75 none 100,000 3.40 20,000 4.30 10,000 4.75 5,000 5.00 none 500,000 4.00 20,000 4.85 10,000 5.30 5,000 5.55 none 5,000,000 4.75 20,000 5.65 10,000 6.10 5,000 6.30 *interpolated 9/10/96 48 RTI
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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.