This is a prop which I created for my daughter. It is based off an old train whistle and has been designed to hold a compressor blow-off tool in the body. The whistle uses compressed air to create a train noise and is triggered when the handle is pulled downward. The whistle is comprised of five prints which are assembled using 3mm screws and 4.2 mm. knurled insert nuts.
M3 Brass Knurl Insert Nuts Metric Threaded
Outside Diameter: 4.2mm, Length: 5mm (See EBay)
In order to create the whistle noise leveraged the work done by MikeP-NZ, published Apr 20, 2013 http://www.semaker.com/productdetail/5589
