Toroidal Propeller

I gutted this $45 Amazon drone https://amzn.to/3R1EyMj to create this unique toroidal drone!The toroidal propellers make it much quieter and losing the frame cuts the weight by about 33%. I included the .f3d file so the props or frame can be potentially adapted to another drone.A toroidal propeller is a type of propeller that is ring-shaped. Toroid propellers are significantly quieter, and are claimed to be more efficient than traditional propellers both in air and water.Wiki - https://en.wikipe