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Hi Keith,
Several months back I made a very few small bore flutes.
On one that I particularly enjoy playing, measures7/8" from the cutting edge of the TSH to the center of the top hole.
The sides of my fingers touch while playing, but that causes no great problems yet. The flute plays well, blows easily and has a nice mellow tone, albeit, slightly airy because of the slightly too deep flue. Other than that, the flute plays nicely and none of the tone holes are hard to get a nice note from. It's been a while since I played the flute much, so I can't give you any info about how the cross fingering plays out.
The sound chamber bore was cleaned (node dams) with a 1/2" twist drill from foot to plug. The SAC wasn't drilled clean (which may also contribute to airyness) and the node dam at the mouthpiece end is drilled with
about a 1/4" hole.
I'm including approximate measurements from the foot end.
first hole center 1-9/16"
2nd hole center 2-3/16"
3rd hole center 2-7/8"
cane node 3-1/8"
4th hole center 3-1/2"
5th hole center 4"
6th hole center 4-9/16"
TSH South edge 5-9/16"
cane node 6-1/4"
SAC exit center 6-5/8"
cane node 9" at mouthpiece
Finger holes are 5/16" and smaller in diameter, about equally spaced, but not equal diameters.
The wall thickness is about 1/8".
I hope this helps,
dale t.
Keith Stanford <eenncar@...> wrote:
Howdy folks,
Some of us have been discussing making Small Bore Diameter flutes. (1/2
inch)
If we use the 18:1 (Bore Length to Bore Diameter) ratio, that would
give us a Bore Length of 9 inches.
Using the "knuckle method" of finger-hole placement and placing the
Finger-holes 1 inch apart would result in the #6 top (North) finger-
hole being about 1-1/2 inch from the TSH.
Will having that finger-hole that close to the TSH cause any problems?
ki-e-ta
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