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I live in Estonia. No bamboos here.
So I was thinking to use copper tube.

I find this http://www.aflauta.com.br/hist/bamboo.pdf
Problem is inside diameter and wall thickness.

If I'm getting it right for every key is right inside diameter and length

I can buy straight copper tubes/pipes:

15mm(outside diameter) x 1,05mm(Wall thickness) 
1,05x2=2.1mm
15-2.1=12.9mm(inside diameter)
18 x 1,0
1,0x2=2
18-2=16 
12 x 1,0 
1,0x2=2
12-2=10  
10 x 0,8
2x0,8=1,6
10-1,6=8,4

Whats the best? I was thinking to use 15mm and 18mm tube
18mm for key a
15mm for key d


I ended up with 15x1,05 copper tube.
Thinking how to use this:
http://11wall-west.com/~ph_kosel/flutomat.html

If I use this measures http://www.phy.mtu.edu/~suits/pvcflute.html
I get 7.2mm for blow hole and 6mm for finger hole. My tube I.D is 12.9

Is there any flute calculator that calculates hole sizes for right key?
I am also thankful for any flute related help what helps me to make copper flute

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Uku~
I don't know the proper dimensions, etc., but just a thought: how about using (or at least practicing with) PVC/plastic? It's easy to drill, etc., and won't tarnish/turn green...

How to:
https://www.google.com/#q=how+to+make+a+flute

PVC

PVC...everyones...*.

Cheap soft metal is better. If I waste metal it can be reused.

PVC has awful sound.

Plastic remains trash.  

Problem is hole sizes. 

This helps me to make proper in tune flute

http://11wall-west.com/~ph_kosel/flutomat.html

I need to know how to use it right.

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