I am going to add another column to my personal training speadsheet so that I can track volume.
I think huff’s idea of using the displacement method is a much more practical way to get a relaible volumetric measurement. I am skeptical that typical length and girth measurements, as they are taken with cloth tape, rigid rulers, and kite string (etc.) can be used to find accurate volumes even with applied calculus. The formula is sound, but the methodology has a weakness. Your result still relies too much on a steady hand, keen eye, and consitent benchmark.
Water displacement can solve this with relative ease. I am working to come up with a methodology that will be easily reproducible by any of our members so we can have a new (and reliable) number to add to our signatures.
1) Accurate measurement of erect (bone pressed) volume based on water displacement
2) Use materials that are readily available to most (all?) members
3) Easy setup, measurement, and disassembly with consideration for time, money, and storage
"Debate the idea..."