for some while i have been wanting to make such a beast but is it possible? basicly i wish to make a low, F and G flute with the 2 octave scale of a standard whistle with the N A style “fipple”. i seached the archives to no avail.
thanks, tansy 
I have made 1 major scale NA didnt like it. I t wasnt good for what NA are good for , and wasnt good for major scale stuff. Its a good idea, but I hadnt seen it work very well. I think the whole whistle mech. that makes NA so easy to play , kinda restricts your 2nd octave journeys.
But you could be the first. Maybe a small NA w/ major like a A or something.
thanks for the advice, i’ll have a go at it when i return home. I’ll make an A since A and low D are the main whistles i play. i love the way they designed the reverse-upsidedown-take apart fipple!
i’ll let you know my findings.
Hi Tansy
The basic premise of the N/A Flute is to use an oversized bore to create better low harmonics. This larger bore restricts the design to 1 octave with a few overblown partials. If you want to make a single or double bore instrument, you must deviate from “traditional” N/A Flutes and keep the bore/diameter ratio between 1/25 and 1/35.
Here is a 6 hole flute calculator program that may help…
http://www.cwo.com/~ph_kosel/flutomat.html
this one is for 8 toneholes…
http://www.cwo.com/~ph_kosel/Flutomat-8.html
The “tricky part” will be “averaging” the square voicing hole (Length + Width / 2) to insert the “emboucure” measurement. Have some fun and play around with some designs.
Thomas Hastay.
(P.S. I believe there is a specific Flutomat calculator for N/A Flutes, but I’ll have to track it down)