Basket Case - High Power Rocket

thingiverse

You must be either TRA or NAR Level 2 Certified in order to purchase and fly motors big enough to get this rocket off the pad safely. Don't attempt to build this unless you are certified at that level. Even then, it's probably not worth the risk. These STLs come from a high power rocket I built and flew successfully on an Aerotech J450 motor. All tubing was made from LOC 3" cardboard. The main parachute and drogue parachute sections had one layer of Soller fiberglass sock (3", 10oz or so), while the small section that fits into the top of the fincan had two layers. All fasteners were #10-32s, installed securely to prevent any damage during flight. Four shear pins on the main side and two shear pins on the drogue side prevented drag separation. Brass shear plates were installed on the inside of the tubes to help protect the screws from damage. Two Eggtimer Quantum flight computers were used, each powered by four 9V batteries (one for computer and one for deployment). Screw switches from Missile Works were mounted in the middle and accessed through holes in the Av Bay. The Av Bay had a single 1/4"-20 rod running through its center. It also featured studs for both 1515 and 1010 rail buttons - #10-32 screws held the 1515 buttons, while 6-32 screws secured the 1010 buttons. Charge holders and flight computers were mounted with #4-40s, while batteries were secured with zip ties. Please note that one side of the Av Bay and Av Bay sled is longer than the other - this design choice helps ensure that the drogue/main sides don't get damaged during construction. 1.6 grams FFFFg BP was used for the main motor, while 1.5 grams was used for the drogue motor. Both were likely overkill. All parts were printed on a CR-10 with Matterhackers Tough PLA, using 6-8 solid layers and 100% to 75% infill depending on the location. The rocket flew successfully to an altitude of 2800 feet on a J450 motor, with a final weight (without motor) of about 5kg. The fin can weighed 1.25 kg, so a splice is needed to secure it in place.