Sentinel Model Rocket

This is a replica of the Sentinel model rocket sold by Estes from 1988 through 1994. It is one of my favorite rockets. The photo shows the original Sentinel on the left, and the 3D printed version on the right. The original is 27" tall, the printed one is 21.5"

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 4 notches in the rings