Bonded Body Magnesium 4/4 Violin

The following is another brief photo description of the making of an Magnesium bodied 4/4 size violin, this one is bonded together with Araldite Super Strength two part exopy resin.
The overall measurements are again from 'Juliet Barker', the contour templates are for a Sacconi Strad 1716 & the neck/scroll dimensions are from 'Strobel'.
The completed specifications are:
Body length    355mm                     Top/end of fingerboard to belly   (20.0mm)
Top bout        169mm                     Bridge centre height                   (32.8mm)
Middle bout    113mm                     E string height above fingerboard (3.0mm)
Bottom bout   210mm                     G string height above fingerboard (5.0mm)
Rib height  32.2/33.4mm                Fingerboard to bridge                 (53.0mm)
Body stop       195mm                     Tailpiece saddle to bridge           (50.0mm)
Neck stop       130mm                     Saddle height above belly             (3.0mm)
Body thickness (Internal) 54mm       String angle 58 degrees
Fingerboard length 270mm 
Vibrating string length 325mm (standard 2:3 ratio
Total length from top of scroll to endpin, approx. 600mm 
The arching are:   top plate 11.8mm, back plate 10.8mm.
(Internal concavity: top plate 11mm, back plate 10mm.)            
with 0.8mm magnesium used for the plates, bass bar and ribs. The rib locating/edge reinforcement strips are 0.8mm Aluminium.
The neck is Bosnian Maple, blocks and sound post are Spruce, with ebony finger board, nut, end pin, pegs and tailpiece, with an Aluminium saddle.
The finished weight with attached Dresden chinrest is 518grams, compared to 582grams for the Aluminium bonded bodied one. The central torsional tube weighs 32grams so there is a further possible weight saving there.
(the weight of a normal 4/4 sized wooden violin is approx. 450grams.
The strings are:
E - D'Addaro Prelude J811 E-Mi 4/4 Polished Steel, Medium Tension.
A - D'Addaro Prelude J812 A-la  4/4 Aluminium Wound. Medium Tension
D - D'Addaro Prelude J813 D-Re 4/4 Nickel Wound, Medium Tension
G - D'Addaro Prelude J814 G-Sol 4/4 Nickel Wound, Medium Tension



This page was last updated  on 10 January 2009