Right,

I've done some calculations based on John's advice, one gives he tension (in pounds) for a set of Heavy strings tuned to concert, second is Heavy strings tuned to CGCDGC and last a set of medium strings tuned to concert.

		Heavy		Heavy		Medium 
  		Conc.		C		
  
  1st		31.8		25.24		27.4
  2nd		29.5		23.42		26.3
  3rd		38.4		28.76		35.3
  4th		45.2		40.27		36.8
  5th		40.0		35.64		34.0
  6th		32.2		25.56		29.0

Diameter for heavy set is .014, .018, .027, .039, .049, .059.

So it would seem by using these strings tuned as they are I am not putting undue strain on the guitar. Is this the best diameter to use for what I want?, should I use lighter as WYSIWYG suggested?, if I were to design a set of strings to fit this tuning at optimum tension what would they be like?

I am surprised that the 6th string exurts less force than the 4th and 5th.

Many thanks this is a good thread.

Chris

---

Added pre-format tags (<pre> and </pre> ) and line breaks (<br>) to get the table right.. --JoeClone