Apogee shock cord ¶ Optimization This is kinda annoying. Ejection charges controlled by electronics are used to split the rocket into the appropriate sections to deploy the drogue recovery system at apogee and the main recovery system Apr 20, 2005 ยท If you still have room in your payload bay - you do not have enough shock cord. You do need a good strong swivel if you are going to do that. 3/4-inch wide width to prevent zippers on cardboard tube, and test strength of 4,500 lbs. , Off White Amazon. This special anchor system is designed for Apogee's PNC-74A nose cone and provides a simple, lightweight attachment point. Build with premium parts like Baltic birch plywood fins, a 30" diameter nylon cloth parachute and a smooth plastic nose cone. It isn't nearly as strong, but it is softer and has less of a tendency to zipper a body tube. That way, I never have to worry about the knot coming loose, and destroying a perfectly good rocket. The ideal shock cord length depends on several factors: 1. hkxavinvlaslgquthaxnktxbomctnhzliehyypmxgnacfhjoeposvewxmdmtwrcavyjrndjepfz