Posted on September 2, 2022May 22, 2025 by Dale Phillips A Method For the Design Of the Guitar Body Outline Part 3: Compound Radius Curves A Method For the Design Of the Guitar Body Outline Part 3: Compound Radius Curves by R.M. Mottola Originally published in American Lutherie #103, 2010 See also, A Method for the Design of the Guitar Body Outline by R.M. Mottola Parametric Models of Guitar Cutaways by R.M. Mottola The article “A Method for the Design of the Guitar Body Outline” in AL#97 presented a model for drawing guitar body outline halves based on five circular arcs and three straight line segments, as shown in Fig. 1. Here I will present an enhancement to that model. As the original article pointed out, the five-arc model can be used to draw most but not all guitar body outlines. So it was probably inevitable that the first feedback I received following the publication of that article was from someone trying to draw an outline for one of the instruments for which this model is not ideally suited. There are a couple of common instruments that have outlines which cannot be drawn using this simple five-arc, three-straight-line-segment model. These instruments, the OM and the Maccaferri-style guitars, have a “dropped hips” look to the lower bout that cannot be approximated by a single circular arc (Fig. 2). Fortunately, the lower bouts of these guitars can be accurately drawn with a simple enhancement to the model. The enhancement replaces the single-arc lower bout curve with a compound-radius curve. A compound-radius curve is composed of a series of circular arcs, each tangent to the one succeeding it. Although all manner of complex curves can be built up in this fashion, for the purpose of enhancing the simple guitar body outline model, we really only need to introduce compound-radius curves of two radii. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on August 1, 2022May 19, 2025 by Dale Phillips Lutherie Binge? Lutherie Binge? by Dake Traphagen Originally published in Guild of American Luthiers Quarterly, 5, #4, 1977 Well somehow I’ve survived my first but not last, European experience, which Tim Olsen dubbed a “Lutherie Binge” in Vol. 5, No. 2. From my perspective, I think the phraseology could be better put as a Life Experience Binge. After all, let’s not limit ourselves to being only luthiers; or at least if we want to view ourselves as being luthiers, let’s expand the term to encompass all other experiences which connect ourselves to our Luthiership. So what about my European Experience? Ten hour jet flight, what a slow method of transportation; Galliards of royalty traversing the English countryside. While resting in the dark forest; was that a Hobbit or maybe an elf? The Mediterranean’s salty, yet beautiful swimming; but where were the troubadour guitarists of Spain: only me expectations? A lot of flamboyant people and machine guns however... Majestic, cultured, the arts of Arts of western conception, if only one wouldn’t be so coined American; such is the way Paris... Oh yes! The ferry’s cooling rushing air and rolling boat with rain, sun, spray, and lovely people enjoying; except for a few green faces, but who knows, maybe they enjoyed being green. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on August 1, 2022May 20, 2025 by Dale Phillips Guitar Outline Formula Guitar Outline Formula by Leo Bidne Originally published in Guild of American Luthiers Data Sheet #79, 1978 From taking several measurements of various guitars, I’ve discovered only slight differences from one to the next. These differences seem to contribute very little to the finished sound. The question is, what is the reason for making a guitar the shape that it is? What are the determining factors, besides the obvious ones? Can there be a “formula” that produces an “ideal” outline? This is what I set out to find. What I came up with, rather independently, so closely resembles, at least in dimension, the existing standard outline of the classic guitar as introduced by Torres, that I wonder if a similar technique may have been in use in the past, in some modified form. This formula, based on the string length, may be of no use to acoustical science, but it’s as fun as a math game, and twice as surprising. Although the information below describes how to derive an outline for a classic guitar with a string length of 65CM, joining the body at the 12th fret, it can also be used, with slight modifications, for other instruments, such as the flattop, the acoustic bass, the electric guitar, etc. Once the outline is established, the depth of the sound cavity can be adjusted with the sides, helping to establish the instruments sonority, as well as adjusting the soundboard bracing. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on August 1, 2022May 20, 2025 by Dale Phillips The Design Diamond The Design Diamond by Dan Neil McCrimmon Originally published as Guild of American Luthiers Data Sheet #100, 1978 The basic idea behind this geometry jazz is to have the elements of design organized in such a way to give a sense of cohesion to the total design. The drawing is of a classic guitar, other guitars will be different but should have simple relationships. I have not tried this with the violin but suspect it should fit in there somehow. The whole design is broken into simple subdivisions of the total length of the sides (i.e. 1/2, 1/3, 1/4). Line XY is half the length of AB. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on August 1, 2022May 27, 2025 by Dale Phillips DVD Review: In Search of the Harp Guitar, It’s History, Players, and Makers, hosted by John Doan DVD Review: In Search of the Harp Guitar, It's History, Players, and Makers, hosted by John Doan Reviewed by Cyndy Burton Originally published in American Lutherie #85, 2006 In Search of the Harp Guitar Its History, Players, and Makers hosted by John Doan 90 minute DVD, 2005 Available for $30 from www.johndoan.com The harp guitar is back. Whether its reappearance stems from the amazing, innovative work of Michael Hedges in the 1980s and ’90s or that of the lesser known but no less interesting guitarists John Doan, Stephen Bennett, Muriel Anderson, James Kline, William Eaton, and many others, this peculiar multistringed instrument — part guitar and part harp — has returned in a big way. (See in-depth coverage of harp guitars in Big Red Book of American Lutherie Volume Three, pp. 178 and 334, originally published in AL#29 and #34.) In Search of the Harp Guitar premiered at the 3rd International Harp Guitar Gathering in Salem, Oregon in September 2005. The film’s maker John Doan also hosted the gathering, perhaps the largest group of harp guitar enthusiasts ever assembled in one place. Many of the film’s “stars,” both musicians and makers, were in the audience. It was a lot of fun to be there and see these folks — many are no strangers to the GAL. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account. DVD Review: In Search of the Harp Guitar, It's History, Players, and Makers, hosted by John Doan Reviewed by Cyndy Burton Originally published in American Lutherie #85, 2006 In Search of the Harp Guitar Its History, Players, and Makers hosted by John Doan 90 minute DVD, 2005 Available for $30 from www.johndoan.com The harp guitar is back. Whether its reappearance stems from the amazing, innovative work of Michael Hedges in the 1980s and ’90s or that of the lesser known but no less interesting guitarists John Doan, Stephen Bennett, Muriel Anderson, James Kline, William Eaton, and many others, this peculiar multistringed instrument — part guitar and part harp — has returned in a big way. (See in-depth coverage of harp guitars in Big Red Book of American Lutherie Volume Three, pp. 178 and 334, originally published in AL#29 and #34.) In Search of the Harp Guitar premiered at the 3rd International Harp Guitar Gathering in Salem, Oregon in September 2005. The film’s maker John Doan also hosted the gathering, perhaps the largest group of harp guitar enthusiasts ever assembled in one place. Many of the film’s “stars,” both musicians and makers, were in the audience. It was a lot of fun to be there and see these folks — many are no strangers to the GAL. John Doan has been playing, teaching, recording, researching, and generally advocating for the harp guitar since the early 1980s. He’s the perfect person to put together a DVD that champions the instruments, both past and present, the players, the music, and last (and perhaps most for AL readers), the makers. He has teamed up with his wife Dierdra, Karla Fisher, and Michael King (the latter three behind the camera) to produce a 90 minute DVD plus another several minutes of hilarious outtakes. It’s an ambitious project covering a lot of territory, and it’s held together with the tack of John’s sense of humor and obvious affection for the instruments and his cast of characters as he: ▶ presents a historical overview of the harp guitar, (he’s in lecture mode here, a role he’s obviously comfortable with from his many years of teaching privately and at Willamette University in Salem, OR); ▶ attends the 2nd International Harp Guitar Gathering in Williamsburg, Virginia in November of 2004 interviewing and recording highlights of performances of many including Stephen Bennett, who organized the first and second international gatherings, and other players including Muriel Anderson, Stacy Hobbs, Andy Wahlberg, and many, many others. ▶ visits luthiers in this country and abroad, namely: Fred Carlson, Kerry Char, Mike Doolin, Jeff Elliott and John Sullivan (two for one), Bob and Orville Milburn, Benoît Meulle-Stef in Brussels, Stephen Sedgwick in England, and Michael Sandén, in Sweden; and lastly, ▶ braves LA traffic with water bottle, laptop, and cell phone in hand to visit the extraordinary resource, Gregg Miner’s collection of “Vintage, Exotic, & Just Plain Unusual Musical Instruments” (www.minermusic.com/minermuseum.htm). Guitar makers don’t get too many starring roles, so this is the part I was really looking forward to (plus I know some of these guys pretty well). Generally not comedians (Harry Fleishman excepted), luthiers tend to take themselves fairly seriously. John wrote the script, and the builders conformed to varying degrees. It’s corny; it’s goofy; but it’s fun. John has made it so. The luthiers are all in their native habitats with the exception of Jeff Elliott, who is with John Sullivan at his shop, the location where John Doan’s contemporary harp guitar was made in 1986. Builders viewing the DVD can glean a lot about these shops — about tool and work space organization, workbenches, and most interesting, something of the people and thought processes behind the chisels. Of most interest to other builders might be the Mike Doolin sequence. Mike builds a harp guitar in a minute or two while John Doan “watches,” thanks to the marvels of very fast, edited time-lapse photography. Other high points for me were Michael Sandén’s model-perfect shop in a lovely old building that’s been in use as a woodworking teaching facility since 1880; Kerry Char’s workshop, where every square inch of wall and hanging space appears to be given over to various guitar and harp guitar relics; and Fred Carlson and John Doan in matching hats with ear flaps seriously discussing Fred’s philosophy of building and life. (Is there a difference?) Aside from the visits to shops and to the 2004 Harp Guitar Gathering, the visit to Gregg Miner’s collection stands out. Gregg is a player with a deep knowledge of the history of harp guitars. If you are interested in the arcane, weird, convoluted, idiosyncratic, and bizarre in the service of music making, this collection will definitely scratch that itch. By the way, Gregg will be on hand the 2006 GAL Convention in Tacoma June 21–25 with part of his collection. He’ll also be sharing historical information and participating in a harp guitar concert, as will John Doan and others. And there will be a panel presentation on harp guitars as well. (See p. 5 for the latest convention information.) I enjoyed this DVD immensely and recommend it if for no other reason than to have a good laugh. The soundtrack is not always consistent, the pacing sometimes feels “off,” the humor is sometimes a little forced, and, of course, not everyone important to the harp guitar’s resurgence could be included, for example Steve Klein, Del Langejans, or Alan Perlman, to name a few luthiers. However, it’s certainly worth seeing and perhaps purchasing. John’s own words sum it up best: “Overall, this film documents guitar history in the making presented in the spirit of fun and discovery reaching back centuries, across continents, and beyond six strings.” ◆ [/wcm_restrict]