Model Rocket Nosecone and Tailfin Section for 30mm (or 1.25") Cardboard Tubes. 29mm motor.

thingiverse

I transformed these components to convert a 30mm cardboard tube I had at my disposal into a precise model rocket capable of accommodating 29mm motors. This design works flawlessly with the cardboard tubes from Reynolds Wrap aluminum foil rolls. To fortify the cardboard tube, I first applied one layer of fiberglass and epoxy, yielding a noticeably stronger result. While fiberglassing wasn't an essential step, it greatly improved the structural integrity of the rocket. By doing so, the tube was marginally widened; however, this disparity is almost negligible. For versatility's sake, I intentionally undersized the OD of the components to accommodate either fiberglassed or non-fiberglassed tubes seamlessly. My cardboard tube measured approximately 28.6mm inner diameter. To prevent both prints from detaching from the build plate prematurely, I strongly advise using a raft for each print. Specifically, the nosecone should be printed with its base downwards and attached to a raft below, while the tailfin must be printed upright as well to minimize distortion risks even when relying on rafts. Unfortunately, I still encountered slight lifting despite employing this method; yet, it did not disrupt the printing process irreparably. After completion, merely remove the rafts, then slide each component snugly into its corresponding slot within the tube. Both the tailfin and nosecone should fit comfortably, but not overly so, showcasing an optimal level of resistance during insertion. To secure the tailfin, use epoxy; however, the nosecone can be attached via a shock cord effectively to absorb the stresses that would arise in flight conditions safely and efficiently. These parts were created on SolidWorks with the intention of optimizing both design simplicity and overall build strength in accordance with practical engineering principles.