Model Rocket 2 piece, made for CR-10 height

thingiverse

Awesome model rocket I designed and tested! 2-piece design with many internal passageways that maximize strength-to-weight ratio and utility. Body has an integral internal rod guide for holding the rocket vertical at launch, using a .125" rod for this. The parachute is connected via the passageways that turn back on themselves to allow a knot to be tied (see section and wireframe views). Those passageways also disperse gas evenly around the nose cone, theoretically improving the likelihood of successful separation. I used a D12-5 engine. This is held with a friction fit, some sanding may be required to get the fit tight, but not too tight. The nose cone has internal passageways that allow for no support or infill. The cross passageways keep the nose cone round so it doesn't jam in the bore, shaped the way they are so no support would be needed. Some light sanding may be required to get the nose cone to slide nicely, basically knocking down the little bumps 3D printing creates. The base rocket is 2.3125" round and 15" tall. When adding the cone, it's 22.9" tall. Height made to maximize the capability of my CR-10 printer. I chose 5% infill on the base. Test flight was great, flew straight and fast. Separation was successful. My 8th-grade shop teacher let me shoot a 4ft tall rocket with a F engine at recess one day, school was a bit different before 9/11...! I hope you find this helpful and your school can still find a way to teach rocketry in the curriculum.