Additional info at : http://leehite.org/Chimes.htm
How to Design and Build a Tubular-Bell Wind Chime Set from Tubes, Pipes or Rods, including pre-calculated dimensions, calculate your own dimensions, patterns for top support disk and striker clapper, patterns for wind sails and wind catchers, pentatonic scale calculator, C9 chord calculator, Support

Disk Calculator with Points on a Circle Calculator along with design considerations for making a great set of tubular bell wind chimes