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- Lines and attachments: 1.5 safety factor for shock force of parachute deployment calculated with rocket dry mass
- Parachute joints and seams: 3 safety factor
Recovery Trajectories:
- Single Separation, Dual-Deployment (Tender Descender)
- First deployment (Drogue Parachute): Apogee (108,000 ft)
- Second deployment (Main Parachute): 1,500 ft
Parachute Sizing:
Design Constraints:
- Descent velocity (terminal velocity)
Want to Find:
- Diameter of parachute
Other Variables:
- Coefficient of Drag (CD):
- Estimation for Drogue: 0.55
- Estimation for Main: 1.6
- Will require testing to confirm
- Air density at deployment altitude
- Drogue: ~108,000 ft AGL
- Main: 1,500 ft AGL
- Launch: 2000 ft ASL
- Vehicle mass: 80.32lbs dry mass
Parachute Design Overview:
- Designing and sewing Zephyrus drogue and main parachutes in-house
Parachute Components:
- Canopy
- Gores
- Vent/Spill Hole
- Shroud/Suspension Lines
- Shock Cord
