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SRB Return to Flight Activities
David M. Martin
Solid Rocket Booster Project Manager
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BOLT CATCHER ASSEMBLY
External Tank
SRB
SRB ET
ET/SRB Forward Attach Area
ETSRB
Bolt Catcher
Separation Plane
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Pressure Cartridge
NASA Standard Initiator
(NSI)
Forward Separation Bolt
Pressure Cartridge Body O-ring
NSI O-ring
NASA STANDARD INITIATOR PRESSURE CARTRIDGE
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INSTRUMENTED BOLT CATCHER
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DROP TEST FIXTURE
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BOLT CATCHER ON FIRING FIXTURE
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Igniter Case
Igniter Propellant Grain
Igniter Adapter
Igniter Retainer
Igniter RodBKNO3 bags
BSM Cross-section
BSM Igniter Cross-section
Propellant
Liner
Case
Exit Cone
Graphite throat
Closure
Igniter
BOOSTER SEPARATION MOTOR IGNITER
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BSM Igniter Pressure Data vs. Time
0
500
1000
1500
2000
2500
0.0000 0.0200 0.0400 0.0600 0.0800 0.1000 0.1200 0.1400 0.1600 0.1800 0.2000
Time (s)
Pre
ssu
re (
psia
)
BSM8368
BSM8251
BSM8367
Nominal Pressure TraceErratic Pressure Traces
BSM IGNITER ERRATIC PRESSURE ISSUE
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IGNITER GRAIN BEVEL
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DESIGNS
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