Alarm Whistle inspired by the London Bobby Whistle

thingiverse

Alarm Whistle Giving a Loud Multi-Tone Sound Like Old London Police Whistles. It's Perfect for Key Ring Attachment. Small, Quick to Build, and Very Loud - Be Careful Not to Damage Your Ears! Print Settings: Printer Brand: Robo 3D Printer: R1 ABS + PLA Model Rafts: No Supports: No Resolution: Low Infill: 20% Post-Printing Finishing and Sounding the Whistle: Lightly Sand the Whistle Inside and Out, Then Remove Any Debris and Plastic Threads from Two Pipes. Coat the Inside and Outside of the Whistle with Plastic Surface Primer to Fill Tiny Holes That Could Cause Pressure Leaks and Difficulty Sounding the Whistle. I Diluted Some Primer, Poured It into a Pipe, Agitated the Finger-Sealed Pipe, and Then Poured Out the Primer - Did the Same with the Other Pipe. After Primer Dries, Check Inside Pipes Again for Threads or Debris. To Use the Whistle, Hold it Vertically Against Your Bottom Lip, with Lips Purse, Blow Down Vigorously into the Center of the Whistle So Both Pipes Sound Simultaneously. If Trouble Blows Both Pipes Simultaneously, Turn the Whistle 90 Degrees and Try Blowing Just One Pipe. The Boss at the Whistle Bottom Allows Attachment to Key Rings, Etc.