The principle of a pyrotechnic chain in Space - by Jean-Lou

What are the typical terminal functions enabled by pyrotechnics for launchers?

Let’s give you a few examples of functions:

• The ignition of an engine.
• The actuation of a mechanism.
• The Opening or Closing of circuits.
• The Ejection , Propulsion or release of a part.
• The generation of gas to pressurize or inflate something.
• Separations of rocket stages, or payload.
• The deployment of solar arrays, antennas…
• Cutting or Fracturing.
• And finally, the Flight Termination System which is a mandatory Safety equipment for the rocket destruction in case of accident during the flight.

What are the typical products used for launcher pyrochains?

Well…we can provide a variety of:

• Pyrotechnic transmission lines and Manifolds for signal distribution.
• Hold Down and Release mechanisms.
• Cable and bolt cutters, Valves, Through Bulkhead Initiators (TBIs).
• Destruction charge for neutralization.

Pyrotechnics benefits for Space applications

Besides, when several mechanisms have to work simultaneously, pyrotechnics makes them perfectly synchronous.

External effects can be adapted according to the user needs: from the very impressive case of flight termination, to a very soft event when implemented close to payloads (that is the case for separation nuts) – some products can even be out of pyro class.

Energetic density of pyrotechnic products is exceptional, removing the need for heavy on board batteries or pressurized gas tanks, saving space, weight in exchange for simpler and sober architecture.