The piston diaphragm is attached to the piston through screwing into the center hole. When the piston actuates, the piston diaphragm pushes upwards, pushing the soft goods out and separating the rocket. A u-bolt is held in with nuts into both of the side holes, which is the line attachment for the main parachute. The tender descender (TD) holds the main parachute in the rocket until main deployment.
CAD:
FEA:
Piston Actuation:
Fixed at center hole. For piston actuation, 425 lbf is applied along the edges, and the drogue applies 80lb of force at the tender descender hole.
FOS for piston actuation: 3.2
FOS for drogue: 9.4
Main:
Fixed at center hole. For piston actuation, 425 lbf is applied along the edges, and the main parachute applies 457 lbf at each u-bolt hole.
FOS for the main parachute: 2
Material: Al 7075, ⅜”