I\'ve been working on a 1/10 scale model of the Herc for a number of years (too many). Besides a number of engineering drawings obtained from MicroFiche at the Smithsonian, I have a very valuable little blue C-130 E/H HANDBOOK. In it are given the following measurements using standard nautical terms. Starting with a waterline of 0, the bottom of the fuselage is at WL126. It\'s crazy I know but if you draw a horizontal line and call it WL, everythings goes up from there. The break on the bottom occurs at WL 141.4, the cargo floor at WL 146, the center line at WL 200 and, top of fuselage is at WL 285. If you use the top 285 minus the center line 200 gives you the radius. Hope this helps.