E-Class Model Rocket

This is a 3 piece model rocket I designed to take Estes E-class engines. There is a 'launch lug' on the outside of the fin section to fit over a 3mm guide rod which I recommend to keep the trajectory straight during launch. There is also a similarly sized internal lug in the mid section tube for attaching the parachute cord and nose cone. For the parachute cord I use 3mm para-cord as it needs to be quite strong to take the force of the ejection charge. The parachute itself is made from rip-stop nylon sheet, which I cut into a hexagon shape that is 600mm across the flats. Light weight kite string is tied to each corner of the parachute and each length is approximately 500mm long, the 6 strings come together and are each tied to the para-cord. The fin section and mid section are glued together using 2 part epoxy and the nose cone is designed to be held in place with a secure friction fit. Additionally, I have made the motor cover plate out of 1.5mm aluminum sheet which I cut out