100mm Air Raid Siren

thingiverse

kcmj crafted an exceptional siren. Tolerances were precise, and parts fit seamlessly together. My dogs and cats formed an unlikely friendship once I printed it. Life was pleasant...\r\n\r\n...until I visited the parts bin.\r\n\r\n[DUN DUN DUUUUN!!!](https://youtu.be/cphNpqKpKc4) Unfortunately, I lacked a motor that matched perfectly!\r\n\r\nWhat's a person with [Fusion 360](https://www.autodesk.com/products/fusion-360/overview), [some calipers](http://amzn.to/2FNt88d), a [3D printer](http://amzn.to/2CUU9n7), and an exasperated spouse to do? \r\n\r\n[REVERSE ENGINEER IT!!!](https://youtu.be/cphNpqKpKc4)\r\n\r\nI have no specifications for the motors in my collection, so I'm including the source file for modification.\r\n\r\nPics of the genuine article and a video demonstration showcasing its impressive capabilities will follow soon.\r\n\r\n3-3-18: Motor Mount V2 posted. Normally, I design items that print without support material, but this time, I added a stop to the motor mount to make assembly slightly less finicky. I also updated the file names.\r\n\r\n3-10-18: During testing, the fan kept unscrewing at high RPM with comical results. Witnessing a 3D printed air raid siren careening down the street at breakneck speed, spewing bits of itself everywhere, was nothing short of hilarious. To prevent this, I designed a fan with clockwise rotation. Stay tuned for an update after re-printing the entire thing in PETG.