Model Rocket
Model Rocket
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For the annual Shop Technician Secret Santa, I chose to make something particular to my person, who will be pursuing a career with Stoke Aerospace after graduation. Naturally, I made him a scale model of the Stoke Space Hopper.
Design
Design
My design started with finding an image of the Stoke Hopper online and figuring out how I wanted to scale it.
Using Adobe Illustrator, I scaled the image such that the major diameter of the main body could be machined with the stock I had available.
In order to make sure that the rocket body was thoroughly supported, I needed to modify the underside and make the legs thicker.
I then measured the rest of the critical dimensions to create a CAD model of the 4 main components that I would manufacture:
Main Body
Nose Cone
Underside
Legs
One challenge I faced was figuring out a way to create the underside and legs such that they could be securely joined and create the angle for the taper that was required.
The solution I came up with was to have protrusions in the underside structure and receptacles in the legs.
Manufacture
Manufacture
To manufacture the rocket, I turned the main body and 3-D printed the other components
The Main Body was made with 6061 Aluminum Bar Stock. The process was as follows:
Drill .25 inch hole in front for Nose Cone
Face front of part
Scratch pass at 1" diameter on front face
Turn OD down to 3.25
Scratch pass at final length
Turn 7 Degree taper until length side scratch pass is hit
Turn 25 degree taper until face side scratch pass is hit
Scotch-Brite surface to produce desired finish
Part at length
For aesthetics, I decided to laser cut the logo of Stoke onto black vinyl and applied it to the Main Body
The Nose Cone, Underside, and Legs were 3-D printed on a Markforged Mark Two using Onyx filament.
The legs were specifically printed flat in the Onyx for structural rigidityÂ
Final Product
Final Product
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