Flywheel Propeller

thingiverse

I saw Tom Stanton's video and thought it would be fun to launch the flywheel propellers into the sky. I noticed that the prop design wasn't very efficient, so I set out to make my own. Attached are two examples: both have aerofoil-shaped blades, they're 150mm in diameter (the original was only 125mm), and I've added a 3.3mm hole through the center for balancing after printing. Both the four-bladed and three-bladed designs have been tried and tested now. So far, none of them have exploded on the launcher yet, but they do tend to spontaneously deconstruct when they hit something on the way up. I've measured a flight time of over 20 seconds so far. As Tom said: "Disclaimer: The strength of the propeller may depend on printing quality and material, therefore hold full responsibility for your actions while using this. Always stand behind the launcher and keep a safe distance."