Four Whistles Version 2

youmagine

Four Whistles Version 2 is my first attempt at a calliope design, utilizing the knowledge I gained from the original Four Whistles model (https://www.youmagine.com/designs/four-whistles). Not being a musician and having some hearing difficulties, this model attempts to play "Mary Had A Little Lamb" using a balloon to power the whistles and a hand crank to power a cylindrical sequencer. In order to play "Mary Had A Little Lamb", I incorporated four whistles in the design of this model, each controlled by one of four air valves. Each valve is controlled by a rotating cylinder with small 2.5mm bumps that activate the valves in the correct order (the cylinder sequencer). To minimize air loss and maximize play time, I designed the valves with a 3 degree preload and used virtually airtight membranes with torsion bars. As an extra defense against air leaks, clear silicone caulk is used to seal the valve body assembly (see below). To complete this model, you will need to purchase a punch balloon, one roll of .7mm thick rubber electrical tape (you'll only need 3 inches or so), a bottle of "thick" cyanoacrylate glue, and a small tube of clear silicone or acrylic caulk. I also used scissors, a single bevel razor blade, a modeling knife, a needle file set, a small slip joint plier, a jewelers screwdriver set, a rubber mallet, and a vise for assembly. As usual, I probably forgot a few files or tools, so if you have any questions, please don't hesitate to ask. I make plenty of mistakes, after all. Designed using Autodesk Fusion 360, sliced with Cura 2.3.1, and printed in PLA on an Ultimaker 2+ Extended and an Ultimaker 3 Extended.