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
for example, the risks are over 20 times as great if the vehicle's breakup qa is 20,000 rather than 5,000 deg-lb/ft2. 6.4 Shaping Constants for Titan IV Mode-5 shaping constants for Titan IV were developed as described in Section 6.3 for Delta, except that a total of 290,000 simulations were run between the programming time of 18 seconds and staging at 300 seconds. The percentage of vehicles that break up during simulated random-attitude turns are plotted against failure time in Figure 26. The same qa's used with Atlas and Delta were used here, and similar breakup results were obtained. 100 90 80 -~ 700 ........ C:-Q) 60 e a.. (l) 50 a.::::, ~ 40 Ill m 30 20 10 0 ~ - -...•••••'.•..•••••••••••.... ;•••••••••n•u••••!..•..••••••.....•i••••..••..•••••••••;••.... •••••.. nHHf ■•••• ,,,, L,---... 'i i ! Titan IV i i I ;, ', f' i i i i i , t1 \: \ r ! r 1 2 r I : i \ i <ii-alpha iin deg-lb/ft i ... ·t,·t·····! :~....i... ·····+·····.............!····..............+.................+..................f.....I : : \ \ : : : : : 1 / i i \ , I + q-alpha = ~,000 i •• ,1·/······i r·1···,··· ···t·········....::.-:i:··:::··c:Falpn·a·;;;·tn;ooo-···f...... I : : \ , : , : : l f .......L..........,.,...!..... ~ '1·· ...............--r--g-alpha.=.~loo □....l...... ,: ! i '~ i i i i ,: ! \ i ! i ! ■ n••••••• ■ nn 1••••••••••.. •••••••~••nn+ ■ ••••••H ■■ !•••••nnH•••••••j••••••••••••••....t•••••• • • 0 40 80 120 160 200 240 280 Failure Time (sec) Figure 26. Titan IV Breakup Percentages 9/10/96 65 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.