A piano accordion

A study of a piano accordion with pleated bellows, bass buttons and shoulder straps on textured paper. Construct the two end housings and the bellows box between them.

A way into the drawing

1. Establish the construction

   Construct the two end housings and the bellows box between them.

2. Resolve the main structure

   Lay the keyboard and bass buttons on their respective side planes.

3. Develop the detail

   Fold the bellows into a coherent pleated sequence and attach the straps.

4. Control the values

   Deepen grille and bellows recesses while preserving highlights on the housings.

A small thing to tryKeep each bellows pleat connected between both end sections.