Just modeled the nose cone and tail cone sections in Fusion360 for a 5 ft long "Marvin the Martian" rocket. Will print them on my Ultimaker 2+ Extended when I get back from vacation (am in Sardinia this week). Here is the 3D from Rocksim:
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Was inspired by the model flown at LRDS recently. This one is only 143cm (+-5 ft) long, and will fly on 54mm motors. The nose is a birchwood ball, followed by a 3D printed nose, and ended by a 3D printed tailcone. In between I will turn disks of hard foam insulation, and give it a skin of fiberglass. Fins will be 6mm birch plywood.
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This will be the tail cone. The core of the rocket is a 98mm phenolic airframe, with through the wall fins to a 54mm motor tube. This got kind of thin at the waist, so I split it into two sections to print. Will probably use PET filament, though I've been itching to try out a couple of rolls of LW PLA, a sort that foams up when passing through the heated extruder, making light weight parts.
Will post a picture of it when it comes off the printer.