Mini-Rocket

thingiverse

Mini-Rocket Features --------------------- A rocket designed for a standard Estes C11/D engine boasts a 24mm diameter and comes with a separate nose cone, equipped with a hook for shock-cord and parachute attachment. The fins are chamfered to ensure optimal spin and stability. A fin retainer ring is added for extra support. The large aft surface area provided by the fins and retainer ring helps pull the center of pressure behind the center of gravity, ensuring stability with high-power engines and short lengths. According to Makerware, the total weight (excluding engine) is 72g. OpenRocket approximations indicate a maximum height of 287m, takeoff velocity of 17.2 m/s, velocity at deployment of 14.9 m/s, maximum velocity of 102 m/s, and stability of 0.657 cal (seeking clarification on this measurement). The rocket's design allows for easy assembly and printing with minimal supports or rafts, reducing time and material usage. Thick walls provide durability for repeated use; efforts are being made to further reduce weight while maintaining simplicity in printing. Printing instructions include using "standard" makerbot 2x settings for ABS: 10% infill, 2 shells, 230C extruders, with minor adjustments (115C bed and 80 print speed) to enhance adhesion. Future plans include a smaller-engine version.