Bill, I get the same results as shown. R = (100/2 + 35) * [(100-.3)/.3] - 75 = 28173 um Ben -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Byrd, Bill J Sent: Tuesday, June 02, 2015 1:34 PM To: [log in to unmask] Subject: EXTERNAL: [TN] minimum flex bend radius Hello, IPC-2223 contains an equation labeled 'Equation 2' for calculating the minimum bend radius for double-sided circuits with coverlay. I wonder if I am missing something because when I plug in the values shown there as an example the 'R' value does not match what is shown there. Any help would be appreciated. Bill ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________