Topic: Tube Length
Over the years I have amassed a collection of various professional bassoon reeds for the purposes of comparing dimensions and observing how different people work towards the goals of response, intonation, etc. as well as having a little inspiration from time to time in terms of experimentation. One thing I have consistently noticed is a general tube length of around 27 (give or take) mm in the reeds of many people that I respect. About six months ago, I switched to the Fox 2 shape and for my first batch o' blanks cut the tubes to 27 mm. However, after I put in a fairly unaggressive Herzberg-style bevel after forming/drying for a while and sanding (even when I didn't) I found my tubes very small and tight (and the walls at the butt became a bit too thin for my liking after reaming). Since then, I have also moved up the collar on the profiler for a slightly wider throat, and in order to have more tube to work with for reaming/beveling and a consistent bocal fit I am cutting my tubes to 29mm (as well as shaping dry because I find that makes a significant difference in the width of the shape).
My question is, what are people's experiences with the effect (if any) of different tube lengths?
The effects that I could think of had to do with possibly changing the position of the third wire and how much you have to ream, and I could also imagine with a post-form bevel that the position of the third wire could have a reasonable impact on the leverage of the bevel (my bevel goes up to the second wire marking, which is always consistent). I seem to remember that someone once suggested to me that it was the equivalent of changing the position of the collar on the profiler but experientially and conceptually I have not found this to be true (as even with same blade length, actually moving the collar would access a different tip-width to throat-width ratio for most shapes, among other things).
Any thoughts on this matter would be greatly appreciated.
Reality can be beaten with enough imagination.