Just received the 7th ed Roark. Came with a www.roarksformulas.com online calculator. Apparently all the formulae etc in an excel spreadsheet. Has anyone already checked this out?
Not Roark, but I've used this:
http://www.ElecToolkit.com
It is based on an Excel spread sheet. It's been helpful but I would prefer a more traditional calculator style application.
Don't know if this would help.