Purpose

The Hermes recovery system follows a dual-separation, dual-deploy architecture. The drogue deployment event is initiated at apogee by a pyrotechnically operated piston. The main parachute is retained via a Tender Descender until approximately 2,000ft. Subsystem and component designs, testing procedures and results, and research is summarized here.

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The design considerations associated the Hermes recovery system are summarized in the following pages:

• Webbing Lengths
  • Webbing Material
• FireBolts
• Shear Pins
• Hermes Parachutes
  • Disk Gap Band Drogue
  • Semi-Ellipsoidal Main Parachute
  • Hermes Deployment Sequence
  • Parachute Analysis
• HADES ("Piston-Cup-Diaphragm" System)
  
  • Pyrotechnically Operated Piston (POP)
  • HADES Piston (SRAD Redesign)
  • HADES Cup
  • HADES Diaphragm
• Packing Procedures and Volumes
  • Hermes Parachute Packing Procedures

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