One source is Thomas D. Rossing's book: The Science of Sound.
In the chapter on brass instruments he lists...
Trumpet 140 cm
French horn 375 cm
Trombone 275 cm
Tuba 536 cm
Baritone 264 cm.
Note two things about calculations of the fundamental frequency. (1) The effective length of a tube, especially one that is flared, is ambiguous. The node or antinode at the "end" is not literally at the end of the metal. (2) For a narrow bore instrument a person generally cannot play the fundamental frequency (which I call the 1st harmonic). Rather, the lowest normally playable note on a trumpet is actually the 2nd harmonic. So if you are trying to have students match lengths with lowest playable harmonic the numbers will be (1) slightly off, and (2) will also appear to be an octave off.
For the nitpickers... some people can blow the fundamental on a trumpet, but it is indeed difficult and not generally considered to be a playable note.
Michael D. Edmiston, Ph.D.
Professor of Chemistry and Physics
Bluffton University
Bluffton, OH 45817
(419)-358-3270
edmiston@bluffton.edu
-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Anthony Lapinski
Sent: Wednesday, April 07, 2010 8:35 AM
To: phys-l@carnot.physics.buffalo.edu
Subject: [Phys-l] musical instruments
For my upcoming Sound topic, I am wanting a list of the LENGTHS of brass
instruments (bugle, trumpet, trombone, tuba, and French horn). I've
searched online with not much success. Does anyone know of a good source
for this information?