How well does it work? See the videos below. Short notes, as well as note-offs, tax the quad motor’s ability to stop the siren rotor immediately. There’s a nice portamento effect as it ramps ...

The loud noise that awoke residents across parts of Northwest Columbus and surrounding suburbs on Saturday morning was caused by a malfunctioning tornado siren at Centennial High School.

The rotor and frame for the parts are 3D printed ... We’ve seen air raid siren builds before, too – like this sturdy wooden unit.