Having spent some time composing a reply to a topic I nom find locked
I would submit the following response.
No, we didn't have the equipment or supposed scientific know how you claim at the Rath workshop.
What we did have, was multiple sets of as near possible identical instrument parts and we would methodically change one element at a time to see if some of the UK's best players could perceive a change. Where ever possible we would not reveal what we had changed to try and eliminate preconceptions regarding alloys, shapes etc.
Is that a scientific experiment...... no....... but it did give us a great deal of valuable information in trying to make instruments that would play well and have broadly predictable playing characteristics.
What you have done as I understand it is taken two slide sections from two different manufacturers that also happen to have outer slides made from different materials and concluded from your experiment that it's the alloys that account for each one behaving in a certain way as a result.
There are I would suggest, simply too many variables in this scenario to conclude anything concrete.
These questions would also need to be addressed.
What size and wall thickness of tube did each maker use to start with?
How many times was the tubing drawn and subsequently annealed?
What material are the inners and outers ?
How hard was the finished tube?
What is the wall thickness of the finished inners and outers?
What is the wall thickness at the stocking?
What is the I.D. of the outers?
Does the outer slide have oversleeves? if so what length and material?
Where are the stays located? What material are they?
What diameter and wall thickness are the stays?
How was the end crook made? pressure formed? hand bent?
What is the construction/ weight/ length of the cork barrels? and what material are they made from?
What is the I.D. of the end crook?
What is the wall thickness of the end crook
What is the shape of the end crook?
Where is the hole for the water key gutter drilled?
Is there a guard fitted?
etc etc etc.......
Like I said before....... Good Luck !!
Here in the U.K. Dr. Richard Smith has published numerous technical papers on a brass instruments including:
Measuring the effect of the reflection of sound from the lips in brass musical instruments
Proceedings of the 11th French Congress and the 2012 Annual IOA Meeting, Nantes, France (2012) (J. Kemp and R. Smith)
Analysis of transients for brass instruments under playing conditions using multiple microphones
Proceedings of the 10th French Congress on Acoustics, Lyon, France (2010) (J. Kemp, S. Logie, J. Chick, R. Smith, M. Campbell)
An Exploration of Extreme High Notes in Brass Playing
Proceedings of the International Symposium on Music Acoustics (Associated Meeting of the International Congress on Acoustics) 25-31 August 2010, Sydney and Katoomba, Australia (2010) (J. Chick, S. Logie, J. Kemp, M. Campbell, R. Smith)
Distinguishing between similar tubular objects using pulse reflectometry
(A study of trumpet and cornet leadpipes) Measurement Science and Technology 13 (5), 750-757 (2002) (J. Buick, J. Kemp, D. Sharp, M. van Walstijn, D. M. Campbell, R. Smith)
Exciting Your Instrument!
Journal of the International Trumpet Guild (USA), 44-45 (May 1999) (R. Smith)
Its all in the bore!
Journal of the International Trumpet Guild (USA), 42-45 (May 1988) (R. Smith)
Holographs of bell vibrations, News and Views, Nature 329
762 (29 October 1987) (R. Smith)
Ensuring high quality in the production of musical instruments
Commissioned by British Embassy for Das Musikinstrument 4, 131-132 (April 1986) (R. Smith)
The effect of material in brass instruments
a review, Proceedings of the Institute of Acoustics 8, 91-96 (1986) (R. Smith)
Improved brass instrument design methods - The Design of the original 928 SOVEREIGN CORNET (1984)
a) Acoustics conference, Kraslice-Czechoslovakia (September 1983). b) Proceedings of the Institute of Acoustics, 17-20 (April 1984) (R. Smith)
Recent developments in Trumpet design
Journal of the International Trumpet Guild (USA), (October 1978) (R. Smith)
Systematic approach to the correction of intonation in wind instruments
Nature 262, 761-765 (1976) (R.Smith and D.J.Daniell)
Any one who id interested in this kind of thing can download these papers free at http://www.smithwatkins.com/9-smith-watkins-articles/library.html