Separation Nut PSM 3/8B
RUAG Space
Smallest low-shock separation nut of the family, developed to fit OneWeb-class satellites of typically 100-200 kg.
Technical specifications
- Target spacecraft class
- OneWeb class satellites, typically 100-200 kg
- Qualification
- AIAA S-113-2005 (former DOD-E-83578A)
- Initiators
- Dual NSI equivalent (PC23, 103377-191/-449/-500, PD222400024-009, 2-8001140-1, 852420-XX)
- Worst-case tests passed
- Single 80% initiator, cold case, no internal lube, no o-ring, 150% external load - 100% success
- Design feature
- Internal mechanical leverage reduces initiator pressure spike and shock; wide thermal operation range
About
The Beyond Gravity PSM 3/8B Separation Nut is the smallest member of the family of Low Shock Separation Nuts designed for interfacing small sized spacecraft with launch vehicles. It has been developed to fit the OneWeb class of satellites, typically 100-200 kg.
The PSM 3/8B introduces an internal mechanical leverage minimizing the required pressure spike generated by the initiators. Hence the shock is significantly reduced without sacrifice of reliability compared with heritage separation nuts.
The separation nut avoids metals with different thermal expansion coefficients to achieve a wide thermal operation range. It has been designed as a direct drop-in replacement for many of the classical higher shock separation nuts.
It is qualified per AIAA S-113-2005 (former DOD-E-83578A) and initiated by dual NSI equivalent initiators. Worst case scenarios were tested with 100% success: single 80% initiator, cold case, no internal lube, no o-ring, and 150% external load.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.