Physics of the Brass Instruments

(Credit to the University of New South Wales, Sydney, Austalia)

History of the Trombone


Pbone Construction Using all Pipe and Fittings (no bending of pipe)

Objective:  Create a characteristic trombone made of PVC

Image result for trombone

  • Outer Slide- 
  • Materials
    • 1′ pipe
    • Snap on bracket for Slide
    • Scrap pipe to make the slide cut to length
    • L-brackets for end of slide
  • Inner Slide
    • Materials
      • 2-1/2′ pipe cut to same length
      • Coupler on ends to be used as slide stop and to connect back crook
      • O-ring or electrical tape for air tight seal
  • Back Crook
    • Materials
      • 1/2′ pipe
      • L- brackets for the end joining of the pipes
      • 1/2′ T- Joints
  • Bell
    • Either attached funnel or 3d printed Bell
  • Mouthpiece
    • Either hose end or 3d printed mouthpiece

Back Crook Construction: (and slide production)


  1. Using the band saw, cut the 1/2′ joints longest tube in half (using the barcode numbers as a guide helps)
  2. Attach the half cut to the each of the half inch pipes (if snug use a rubber mallet to move it along the pipe.) It should be snug without glue
  3. Adjust the brace to a comfortable location that adds stability using a rubber mallet and a flat surfaceimage2
  4. Attach the back crook using L connectors (if correct the tubes should be equal distance the entire length of the tubes, if not make adjustments to the back piece to ensure proper distance.image1


(The only difference between the back crook and the slide is that the brace will be further away from the back crook)

Inner Slide Construction

  1. Once the outer slide is completed, take another long piece of 1/2′ pipe and place the 1/2′ pipe inside the 1′ pipe.  Leave extra pipe out of the tube and cut.  Repeat for the other side of the slide.image1
  2. Using the similar method of bracing for the slide and the back crook, create a bracket for stability of the inner slides.image1(2)

Bell Construction Using the 3d Printer

Adding Additional Bracing/Weighting the Instrument

The slide part of the instrument will be heavier than the back of the instrument.  While bracing the instrument consider adding sand, weights or other materials inside of the 1/2′ pipe that used as braces.

Attachment of Bell and Slide Using Couplers

Using 1/2′ couplers combine the slide attachment to the back crook of the instrument (cutting is not done yet)


The back crook will be too long, so the player needs to determine the best position for the mouthpiece (another brace will be added as well for support to the back crook here)