◆ SpookStack

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 - ~ 70 0........ 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