Sphere/Toroid Comparison Chart

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mddeming-at-aol-dot-com>

Hi All! 
I found this on an old paper spread sheet. No reference as to source. I think 
the relative sizes are right, but can't swear to it. 
C-C          Chord Nom. 
Toroid     Toroid        Cap       Equiv.Diam. Equiv.Diam. 
d1(inches) d2(inches) pf         sphere (in.)  sphere (m) 

8                4.00 7.723         5.47 0.1390 
8               6.00 4.540         3.22 0.0817 
10               4.00 10.675         7.56 0.1921 
10             6.00 8.243         5.84 0.1484 
12                   4.00 13.262         9.40 0.2387 
12            6.00 11.585         8.21 0.2085 
14            4.00 15.574         11.04 0.2803 
14                   6.00 14.605         10.35 0.2629 
16             4.00 17.675         12.53 0.3181 
16                6.00 17.359         12.30 0.3125 
18                4.00 19.607         13.89 0.3529 
18             6.00 19.893         14.10 0.3581 
20             4.00 21.402         15.17 0.3852 
20             6.00 22.245         15.76 0.4004 
22             4.00 23.083         16.36 0.4155 
22             6.00 24.444         17.32 0.4400 
24             4.00 24.668         17.48 0.4440 
24             6.00 26.512         18.79 0.4772 
26                4.00 26.170         18.55 0.4711 
26             6.00          28.469         20.18 0.5124 
28             4.00 27.601         19.56 0.4968 
28             6.00 30.329         21.49 0.5459 
30                4.00 28.969         20.53 0.5214 
30                6.00 32.103         22.75 0.5779 
Comments? 

Matt D.