An excellent tool written by and provided with permission from Robert Blaske. This tool requires JAVASCRIPT to function.

		ShroudCalc 2.2 Robert W. Blaske  Input Shroud Dimensions: Small Diameter: (SD) Large Diameter: (LD) Height (90° vertical): (H)       Resulting Flat Arc: Small Radius: (SR) Large Radius: (LR) Angle: (A)