Parachute Materials:

Parachute Design - Drogue Sizing:

Parachute Design - Main Sizing:

• Semi-Ellipsoid Design
• Height to Width Ratio of 0.707
• Parameters from Richard Nakka

Parachute Design - Seams, Lines, Joints:

• Primary Joints (Both Main/Drogue):
•  (A) Parachute Skirt to Suspension Lines
•  (B) Suspension Lines to Risers
•  (C) Risers to Metallic Hardware (swivels)
• Joint Design and Testing:
• Straightforward Insertions joints 
• Plan to continue testing to build basis
• Vectran 600 (Suspension Lines: A & B) and Technora 2500lbs (Risers: B & C)
• Use Testing to solidify margins on current design [5” insertion w/ ½” back stitching on each end]

• Hems: 0.79in seam tolerance using zigzag stitch
• Gore on Gore seams: using a turned lapped seam, stitch with straight stitch
• Standard for parachutes, hide possibly fraying edges inside the seam itself
• Lines: sewed on after gore seams are completed, sew onto gore seams with zigzag stitch, locked at both ends
• Testing: 
• Tensile Testing Seam Construction
• Machine: Instron 5567 Mechanical Testing Machine (50 kN limit)