Stuka Siren for sewing machine motor

thingiverse

People from five miles away were complaining loudly about how noisy it was. A replica of a Stuka siren, also known as a Jericho Trumpet, is used in German planes during the Blitz as a psychological tool to instill fear. Use a universal motor commonly found on sewing machines for the drive. It can be purchased online for approximately $15 with a speed controller that allows you to change the sound and volume of the siren. Scale up the parts by ten times and rotate them so that the bottom is on the print bed. For the chassis, place the side with the holes for the motor at the bottom. The blades should have the circular part without the blades facing downwards. Printing without supports should be possible.