Dual tube whistle

thingiverse

I wanted a decent small loud whistle I could hand out to people where I work. I downloaded several whistles and printed them, but couldn't find one that worked reliably. So, I decided to make my own. I started with a small metal whistle I have carried for years, and tweaked the design until I got something that is loud and prints reliably on my Rostock Max V2 3D printer. One of my goals was a reasonably fast print. At first, I had to print at 0.1 mm to get a good whistle, but I found by slowing the print speed down just a little (35 mm/sec) I could print this at 0.2 mm and get a good working whistle with a print time of around 35 minutes. I mostly use PLA, but if you get strings you have to clean them out or the whistle won't work well. A medium size nylon cable tie makes a great tool for cleaning out the fipple - that's the name for the slot in the whistle that channels the air into the notch. The internal tubes are 41 and 40 mm in length; this determines the tones and the difference sets the whistle's beat or warble. My son Byron added the name "Super Sonic". I hope this prints well for you as it does for me, and that you find it useful. Remember, if you're heading into the back country, please carry a whistle! Update 06/08/16: Added a new version. Thingiverse member Qrome designed a nearly identical whistle, and I liked the wedge shaped fipple in his whistle. I wanted to see if I could figure out how to do that in FreeCAD. I discovered a cool trick for doing this - message me if you're interested in how it's done. This version is VERY LOUD!!! Printer Settings SeeMeCNC Rostock MAX BYOE No Rafts No Supports 0.2 Resolution 20% Infill Notes: I find this prints best at a somewhat lower speed - I used 35 mm/s. For PLA be sure to tune your printer for minimal stringing. I Designed This using FreeCAD.