How about making five identical flutes out of brass, aluminum, PVC, CPVC, darlin, playing a tune on each, and having people guess which is which. I would love to see how many people got it right.
Better yet post five clips from the same flute and have people think that they are 5 different flutes. 
Hereās a funky, flute. I believe Darth Vader plays one of theseā¦
url]
http://www.matitflutes.com/
http://www.nrayworth.freeserve.co.uk/flute/notes/carbf.html
I like ceramic.
Thatād be a good trick.
Loren
Okay, I heard that many lined heads crack when the wood shrinks but the metal lining does not. Has any one made am insert that was not a perfect tube and could shrink? Kind of like a pre cracked lining?
And would any one want to play it?
This can be true, but letās not forget that plenty of partially lined (anything with a standard tuning slide), and some completely unlined (wood socket and tenon) flute heads split as well. Unfortunately, nothing seems to be 100% proof against cracking, but then thatās wood for ya.
Loren
As long as you askā¦
I want a drone keyless flute like this and of course the matching attractive head gear!
I know you can do it Doug!
iād still like to see a āsuper-wedgeā that would give a pvc flute the same effective bore profile as some of the classic conical flutes.
& while weāre tossing out flute ideas, how about hats? a hat w/ a wide brim makes it easier to hear yourself in a session. a stocking cap over the ears makes those really high notes a bit less piercing.
enjoy! /dan
Okay, Iāll bite: What would be the advantage to that? I doubt price, since by the time you made such an instrument it would cost about the same as a conical bore Delrin flute. So, what am I missing?
Loren
itās probably me thatās missing something. i imagine starting w/ a dowel the same size as the inner diameter of the pvc. some sort of simple jig would let you repeatably sand it down to the right shaped wedge w/ hand tools, or a drum sander on a drill press maybe. then coat the wedge w/ some epoxy & glue it in the pvc pipe. seems like this would be less complicated than drilling & shaping a bore on a lathe, but iām just guessing. any thoughts from folk who actually do this sort of thing? 
enjoy! /dan