How i made the loudest 3d printed device

here's the sirens: https://cults3d.com/:4463549 Disclaimer: The project in this video is a modern engineering recreation of an acoustic design originally developed for military aircraft in the 1930s. The content is purely educational, focusing on fluid dynamics, 3D printing, and RC mechanics. It does not condone or support the actions of the German Luftwaffe or any wartime regime. airplanes and 3d print ed stuff here: https://linktr.ee/germy_ballswell?utm...