Lightweight

The Body is made from 1" Diameter Bore (0.915 Inside Diameter), The tuning coupler and beak is hand turned from solid 1.25" gray PVC stock.  The block/windway floor is made from Delrin/Acetal to help repell water.  The windway is a wide but low-height style windway with a D shaped inlet and curved windway exit at the fipple window.   Lacquer Clear Coated.

Good Spacing but doesn't compromise sound.

Tone holes:  From Bottom hole to Top diameters:

1:  5/16" inch  0.794 mm

2:  7/16" inch 1.111 mm

3:  9/32" inch 0.714 mm

4:  11/32" inch 0.873 mm

5:  7/16"  inch  1.111 mm

6:  7/16"  inch  1.111 mm

Distance between holes:

5&6:  1.80" inch 45.81 mm

4&5:  1.37" inch 34.74 mm

2&3:  1.36" inch 34.44 mm

1&2:  1.53" inch 38.99 mm

Three Sample MP3 Sound Files:  ldal1.mp3  ldal2.mp3  ldal3.mp3

This whistle has great consistent response on each tonehole, here is the performance chart.

Low-D Cutoff Ratio Chart

Individual Tone bodies now available

Cutoff Ratio is Local Tonehole Cutoff Frequency divided by Tonehole Frequency.

OPEN SOURCE WHISTLE DESIGN SPECS:  ALUMLOWSPECS.XLS

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