◆ SpookStack

D.5 Thor Launch and Performance History (Not Including Delta) The entire Thor history is depicted rather compactly in bar-graph form in Figure 40. The solid-black portion of each bar indicates the number of launches during the calendar year for which vehicle performance was entirely normal, in so far as could be determined. The clear white parts forming the tops of most bars show the number of launches that were either failures or flights wher~ the launch vehicle experienced some sort of anomalous behavior. Every launch with an entry in the response mode column of Table 46 falls in this category. Such behavior did not necessarily prevent the attainment of some, or even all, mission objectives. 35 .-------......----,---.----,.--,--...--_____, 30 m 25 C 0 ·en Cl) ~ 20 5 ... 0 55 60 65 70 75 80 85 90 95 Launch Year Figure 40. Thor Launch Summary D.5.1 Thor and Thor-Boosted Launch History The data in Table 46 summarize all Thor and Thor-boosted space-vehicle launches since the program began. A launch sequence number is provided in the first column. A launch ID and date are provided in-columns 2 and 3. The fourth column indicates the vehicle configuration. The fifth column indicates the launch range. The sixth column indicates the failure-response mode (1 through 5 and NA) that RTI has determined best describes the failures that occurred. For Mode 3 or 4 failures, a suffix of 'T' indicates the vehicle tumbled. Successful launches are indicated by a blank in the Response- 9/10/96 164 RTI