The technical requirements for the inter-stage separation function for launcher in Space - by Romain

What are the technical requirements for the inter-stage separation function?

As one of the most critical functions of a launch sequence, Inter-stage separation shall fulfil very high standards of reliability.

Synchronicity of the separation among the different perimetric points is KEY.

And therefore speed of execution enabled by Pyroalliance is a great feature for such applications.

Depending on requirements, a trade-off shall be performed between:

• Cutting performance when using cutting cords.
• And controlling external effects such as mechanical shock as well as projection of splinters.

Typically the closer you get from the upper part of the launcher, the closer you get from its payload, the more important this factor becomes.

What are the pyrotechnic solutions adapted to lower stages separations?

We have a unique know-how in terms of detonating cords for inter-stage separation solutions.

And our dihedral cutting cords offer a very sharp cut with high levels of cutting performance.

Here is an example of cutting performance in a steel cylindrical target.

And observe how clean the notch formed by the shaped charge jet of the cutting cord is.

We also provide solutions for the separation of strap-on boosters.

For this particular case, Pyroalliance designs customized separation rings to integrate our cutting cords.

So, they use the specific feature of our cutting cords being bendable.