The file 'Levavasseur Whistle 3D Printer Model' is (SLDPRT,STL) file type, size is 5.5MB.
Imagine taking the cross section of a standard referee's whistle and the revolving it about an axis to form a toroidal shaped sound cavity - that's what Robert Levavasseur did when he patented this whistle in 1956. Word has it that in testing a giant 6ft version of this type of whistle, the sound was so loud that it ruptured the internal tissues of Levavasseur and two of his colleagues.
This whistle is a little simpler (and smaller) than the version in Levavasseur's patent (http://www.google.com/patents/US2755767). While this version does whistle, I'm sure a lot could be done to optimize the sound. In any case, it will certainly grab the players' attention out on the field!
| whistle.SLDPRT | 902.0KB | |
| whistle.STL | 4.6MB | |
| whistle_1.STL | 4.5MB | |
| whistle_nosupports.STL | 3.8MB |
