Ok! I came to the party with 19 answers; which I thought pretty good. I now see it was too little too late! The story of my life. Oh to be in Carolina in the morning !
Mark:
BELT
76.94255678 inches

(I see that)
length of each tangent segment is sqrt(560)
fraction of contact with large disk is [360 - 2*asin(sqrt(560)/24)] / 360
fraction of contact with small disk is [180 - 2*acos(sqrt(560)/24)] / 360
You win again; I had 93.38 and my scribble doesn't make sense even to me!
BTW Dutchy; leave off with all the praise for Mark or he will expect a big raise, and I don't want to disappoint him.
Nice update TTH, just a pity I can't remember all the answers now!
Poor Missme, it weren't the cough that carried her off; it were the coffin they carried her offin!
Get well soon toot's; you seem like a fungi.
BARBERSHOP
BARBERSHOP
BARBERSHOP
BARBERSHOP
PEN sword