[TPIN] Bore sizes......

[Dave Arndt]

More directly, I think it's a matter of how the air column resonates in the
horn.  It seems reasonable that this would be affected by not ONLY bore
size, but the bell flare, metal gauge (perception of sound/vibration) and
how the bore is "stepped" through the horn.

For example: The Bobby Shew model Yamaha has a relatively small bore
*specification* - but because of the way it is engineered, the horn blows
very free and open.

On the other extreme:  My Kanstul 1600 is a .460 bore, with the rough
equivalent of a Bach 72 bell, and a thinner gauge metal.  The difference in
bore size between this horn and my Bach 180 ML/37 is only .001 inches - but
the difference in how free blowing the Kanstul is astounds me.

- da


-----Original Message-----
From: tpin-bounces+darndt=oriongate.net at tpin.okcu.edu
[mailto:tpin-bounces+darndt=oriongate.net at tpin.okcu.edu] On Behalf Of Byron
Jones
Sent: Tuesday, May 20, 2008 3:44 PM
To: Olaf Brattegaard
Cc: tpin at tpin.okcu.edu
Subject: Re: [TPIN] Bore sizes......

It really seems like (and I mean "seems like", since I can't prove it,) the
larger the bore, the more air I can push through the horn. Even at micro
measurements. I know engineering has something to do with it, too, but bore
size seems to allow more air to be allowed through the pipe, and it does
make a difference. I just can't play the ml bore horns for more than a tune
or two, then I'm groping for the larger horn so I can keep the air flowing.
I know it's not just me.....

--
Byron Jones
Trompetista de Son Venezuela
Flip Oakes Wild Thing Bflat Trumpet
Olds Clark Terry Flugelhorn
www.sonvenezuela.com


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