ZipLine and Toroidal Style FPV Drone Props

We haphazardly reverse engineered the drone props from the Mark Rober "Zipline" video. These are from our YouTube video about printing and testing "Quiet Props" (hint: they aren't much quieter, just different lol). You can find that video here: https://youtu.be/t3IMRYUSYvc?si=T2KJXWS6bpGnTO-6

We have a few different sizes and here are a few pointers to get you started. (The video explains more along with showing the results of various methods).

PLA prints cleaner
PETG prints stronger
CF infused materials could be better but more dangerous

Salt annealing may work better - put the print in a container of salt that will hold its shape and heat it past its glass transition temp.

0.2mm with 100% infill and 3 wall layers seemed to work the best. Extra top and bottom layers helps with overhang strength.

THESE ARE EXTREMELY DANGEROUS WHEN THEY EXPLODE, WHICH THEY WILL.
STAND AT LEAST 100FT AWAY WITH SAFETY GLASSES AND GEAR.
YOU WILL CRASH, AND PARTS WILL FLY.

Print Settings
Rafts:
No
Supports:
Yes
Resolution:
0.2

Infill:
100

Filament material:
PETG

Notes:
Layers are stronger when arranged in the direction of force (flat instead of standing). This requires more cleaning, but is the only way to make them reliable in our experience.