R.L. flames himself....
What that sleep deprived moron, me, did so very vert wrong is too stupid to be forgiven... I mis calulated the simplest part of the calc! The period is NOT .57 s...it is 1/.57 s!!! T in the preceeding is 1.75 s...
that gives r= 11.3/39.4= 29 cm....
BAD BAD R.L.!!!
