Posted on October 10, 2025October 10, 2025 by Dale Phillips Derivation of Formula for High Point of Back Derivation of Formula for High Point of Back by Jon Sevy Originally published in American Lutherie #75, 2003 and Big Red Book of American Lutherie Volume Seven, 2015 Quantities: S = height of guitar sides at neck block B = height of guitar sides at end block E = B - S (difference in height at shoulders and butt) L = length of guitar body A = length of body measured at angle (see diagram) D = deflection in arched back (see diagram) R = radius of back arch Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
