![]() This lets you rinse off your sandpaper as it clogs, and it also stops the dust from flying. Sand the tube at a sink, keeping the tube wet and using wet-and-dry sandpaper. If there’s too much hiss later when you play the flute, this may mean the mouthhole edge is too sharp. Smooth all hole edges and end edges with a narrow, very sharp knife blade or an apple peeler. Don’t use flat bits-the size of the holes they make is not accurate.Īfter drilling, stick a long wood dowel into the tube to break loose the plastic “shavings” hanging inside. Find instructions for this in books on tools and sharpening. You can order these specially or else modify regular twist drill bits by grinding. Or avoid the grabbing entirely with “zero-rake” drill bits. For drilling, use a very slow speed to minimize “grabbing” when the bit reaches the interior. Plastic pipe can be cut just like wood, though it dulls your tools more quickly. Also avoid gray PVC electrical conduit, both because of possible toxicity and because of its greater wall thickness, which will hurt octave tuning. Since it’s meant only for drainage, there are no restrictions on the toxicity of the chemicals added to it. The plastic we’re talking about is PVC (polyvinyl chloride), used for cold water supply, and its close cousin CPVC (chloro-polyvinyl chloride), for hot water. And once you develop a pattern, the pipe’s regularity allows a perfect flute every time. It’s fine acoustically, if you use the right dimensions. It’s waterproof, crack-proof, and nearly unbreakable. Sanded clean and smooth, it’s attractive, requiring no finish. Plastic plumbing pipe is nearly ideal for simple flutes. The ideal ratio of length to inside diameter is around 21/1.ĭimensions of PVC Pipe Schedule 40 PVC and Steel Pipeīack To An圜.Use smaller pipe for high pitched flutes and picollos, larger pipe for instruments that play lower.For whistles or flutes oval embouchure holes, use the area of the opening in calculations.For flutes, drill the embouchure hole so blown edge meets pipe surface at about 45 degree angle. ![]() The cutoff frequency should be well above the higher octave note for the hole. Use big holes, especially for higher notes.Use the "print" button to create a printable "cut sheet" for your design.If the results don't automatically update when you make a change, you the "refresh" button.Note that for metric measurements, the increment is 0.5mm and for inch measurements it is 1/64". You can use the increment and decrement buttons beside the hole size to change them. Select the bell note from the pull-down box.Enter inside diameter and wall thickness of your pvc pipe.Choose the number of holes for your design.For metric, all measurements are in millimeters. Select metric measurements, if you want to use it.
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