Hello , I managed to dig this up, hope it helps a bit.
"DEPTH OF CUT: Using a sweep-9 (a semicircle, radius deep) as the standard, my measurements indicated the various sweeps among same-width gouges (I used 25mm) related as follows:
Sweep #3 = 5% the depth of a #9
#4 = 10%
#5 = 15%
#6 = 25%
#7 = 50%
#8 = 75%
#9 = 100%
#10 = 110 to 112%
#11 = 125%.
"SAME-ARC GROUPINGS: Maintaining the same arc (different lengths of arc from the same circle) while changing the width of cutters, requires changing the sweep as well.
Starting off with 20 mm wide examples from various sweeps (i.e., a 9/20; an 8/20; a 7/20 etc.) the sweep changes required to maintain a constant arc were as follows:
For a 9/20 the progression = 5/3, 6/10, 7/16, 8/19, 9/20, 10/22, 11/22.
For an 8/20 the progression = 5/5, 6/11, 7/18, 8/20, 9/22, 10/25, 11/25.
For a 7/20 the progression = 5/8, 6/15, 7/20, 8/26, 9/28, 10/30, 11/32.
For a 6/20 the progression = 4/5, 5/11, 6/20, 7/32, 8/38, 9/45?
For a 5/20 the progression = 3/6, 4/8, 5/20, 6/35, 7/45?
"This information may well be of little practical use, success being more in what is pleasing to the eye as opposed to being mathematically correct.