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)
Lines Diagram:
Lines:
Line: | Material | Length: | Calculations: |
Drogue MPT Riser | Technora, 2,500 lbs capacity | 30 ft | 3 x MPT Length + Motor Length |
Main MPT Riser | Technora, 2,500 lbs capacity | 60 ft | 6 x MPT Length + Motor Length |
Nose Cone Riser | Technora, 2,500 lbs capacity | 15 ft | < Drogue MPT Riser Length |
Main Bag Riser | Technora, 2,500 lbs capacity | 1 ft | < length of MPT coupler section |
Attachments:
- Soft Links
- Purpose: Attaches deployment to risers and risers to suspension lines
- Capacity: 4,500 to 18,000 lbs (variable based on number of loops, loops determined by connection criteria )
- Material: Technora 2,500lbs
- Swivels
- Purpose: Allows lines to move without being tangled
- Capacity: 1,800lb
- Material: 316 Stainless Steel
