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C39

OBJECTIVE: TERMINATE SRB THRUST WITHIN 10 SECONDS WITHOUT DAMAGE TO ORBITER, EXTERNAL TANK, OR PRIMARY STRUCTURE

• EXPLOSIVELY CUT OPPOSING VENTING - PAIRS IN CYLINDER ABOVE NOXZZLE

• NO ADDITIONAL THRUST AT SEVERANCE

• VENTS SIZED TO CONTROL DECREASE IN THRUST/ACCELERATION

• VENT DIAMETERS INCREASED (FURTHER SEVERANCE) AS PRESSURE DECAYS

Figure C20 SRB Controlled Thrust Termination