This is a replica of the Sentinel model rocket sold by Estes beginning roughly twenty years ago. It is one of my favorite rockets. I scaled it down by .8 so the fin section would fit within the 6" diameter build plate of my Orion Delta printer. The body wall is 1 mm thick, allowing for two extrusions of .5mm.
If your printer's build plate is 8" diameter or greater, you can scale the rocket up by 1.25 in your slicer and use an extrusion width of .625 to print it at full original size.
I have not flown this rocket, so proceed at your own risk if you decide to do so. At the .8 scale, It should be possible to use BT-55 centering rings to make a motor mount that would be held in place between the bayonet fitting on the mid section and the retainer ring built into the bottom of the fin section. You would need to file/cut notches in the rings to get them past the bayonet bumps in the fin section. If printed with 1.25 scale multiplier, BT-60 centering rings should work.
Parts connect with bayonet fittings. Line up channels with bumps, insert and twist 90 degrees clockwise until you feel it snap in place.
The "fore" section has an internal lug that can be used to attach a shock cord. You will need to use a piece of stiff wire to thread a cord though the lug.
Printer Brand:
SeeMeCNC
Printer:
ORION Delta 3D Printer
Resolution:
.2mm layers
Infill:
See Slic3r settings
Notes:
See included Slic3r settings.
NOTE: You must print each part in the orientation shown in the second photo to avoid need for support.
The "extra length on restart" setting is necessary to maintain priming of the hot-end and avoid under-extrusion during the numerous travel moves on the fin section.
The base.stl part is the base of the nose cone - the part that slip-fits into the "fore.stl" section.
