Sinphone (early Hurdy-Gurdy)
This has been a
very interesting project. I started without plans or technical
drawings, with only an image of a woodcut and no real knowledge of the
workings of a Hurdy-Gurdy. I actually started cutting wood before
I saw the first images of the workings of a Hurdy-Gurdy. With the
help of the Hurdy-Gurdy mailing list members, and Alden and Cali of
Olympic Music in Washington, I have made it this far. This is an
experimental prototype, I am using it to test design elements for a
much more aesthetically pleasing 'final version'. I will try to
document the unusual experiments here as I make them.
The first unusual element is a Corian wheel. I wanted to see if I
could build a functional wheel that would not go out of true or out of
round, that would not be affected by weather or by humidity.
The next element I am going to try on the box is a bridge and nut made
out of Corian as well - should make yet another improvement in
With one key and tangent
All keys installed
Turning the brass collar for the Corian wheel
Recess drilled with a 1.5 inch
forstner bit on a squared drill press
Perfect fit of collar into socket
Rough cut on scroll saw
4-56 screws and washers through back of wheel, into threaded holes in
Wheel blank drilled through,
using collar as a guild, then mounted on a piece of the axle steel and
fitted into the lathe for truing. Lots of very fine dust when
A propeller balancing tool for model aircraft is a perfect run-out
tester. Thin aluminum foil shims added behind the collar until 0
The old maple wheel out, the new Corian wheel in. The strings
have just been re-installed, and have not been re-cottoned. The
wheel needed 'primed' with rosin/alcohol mix before it held rosin well.
This is the new Corian nut set. It is very smooth, very hard, and
seems to do a great job.
This is the new Corian bridge
set. The HG responded better with a wooden bridge on the mouche,
left it as hard maple. The Petit Bourdon and chantrelle bridges
very well out of Corian - it is smooth and slick and doesn't even mark
the strings, and doesn't need lubrication as long as you polish it
well. The wheel is a baltic burch ply wheel - I like it best of
the ones I have tried so far.