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Through Bulkhead Initiator

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Pyroalliance designs and produces a series of Through-Bulkhead Initiators (TBI) for the European Ariane and Vega launcher families.
TBIs are designed to ignite the propellant in a solid rocket motor and also guarantee tightness after functioning between upstream and downstream side of bulkhead, preventing any pressure loss.
They are a key component of the propulsion function reliability/safety. TBIs belong to a pyrotechnic chain which ensures transition from a detonating signal stemming from a detonating transfer line into the combustion of an ignition load, across a tight barrier.

TBIs, combined with other Pyroalliance’s products, are part of Ignition pyro-chains for solid rocket motors or retro-rockets. They are designed and manufactured under Pyroalliance design authority

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Through Bulkhead Initiator at a glance

Pyroalliance’s TBI flies on Ariane 5 and Vega ArianeGroup and ESA

Benefits

  • Structural barrier preventing loss of pressure of downstream elements
  • Mass savings through the reduced quantity of embedded electrical power
  • Free from primary explosives, therefore one single Safe & Arm Device at the beginning of the pyrotechnic chain is sufficient
  • Reduced dispersion of ignition times
  • High level of safety (EMC and lightning immunity)

 

Applications

  • Single pulse solid propellant motors ignition, from retro-rockets (few kilograms) to heavy boosters.

 

Please scroll down to discover more specifications on TBI:
Key figures, product operation mode video, the complete product sheet to download.

Key figures

TECHNICAL SPECIFICATIONS OUR RANGE OF PERFORMANCE
OPERATING TIME: < 5ms
OUTPUT ENERGY:
Range of 3000 J

IGNITION MODE: Detonating line
DONOR & RECEIVER LOADING: RDX
LEAK RATE: Better than 10-6 scc/sec after functioning
OPERATING TEMPERATURE: -53°C to + 71°C
STORAGE LIFE TIME 7 years (depending on
storage conditions)
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