Pity the poor British and French pipe makers, producers of crap like Barling, Comoy, Sasieni, Dunhill, Charatan, Loewe, BBB, and GBD with their shitty tiny airways. Pity the millions upon millions of pipe smokers too stupid to know any better. Pity all those incredibly stupid tobacco blenders, like Sobranie, Gawith, Gawith and Hoggarth, Murray's, Gallaher, Bell's, W. O. Wills, who were too incompetent to realize how those shitty small airways were destroying their work, not that they could tell, since they were obliged to test and develop constantly held back by those shitty skinny airways.
Now take a moment and ask yourself, how plausible does that story seem to you?
I like the engineer's observation at the beginning of this thread. My father was an engineer, world class, and to his surprise, world famous within aerospace and aeronautical engineering. There's a story behind that, but this isn't the place to tell it.
However, I'm used to how engineers think, and was trained to think in that manner. So I'm less likely to prefer mystical answers to concrete ones. Back to the subject.
It's not a plausible story.
It's also to some degree, pure and unadulterated bullshit.
Charatan used a 4mm bore for its straights and a 4.7 for its bents. That's from Ken Barnes, who would know. That is not a narrow draft hole. Wide airways are not a new invention. Barling varied its airways depending on model. So did others.
So maybe those centuries of pipe smokers, makers, and tobacco blenders weren't merely clueless idiots.
Seems possible.
I like the traditional draws.
I like the contemporary "open" draws.
There's a difference in feel, and sometimes there's a problem with some fine traditional cuts and open draws because the tobacco bits can suck right down the airway and into my mouth, so I don't use my artisan pipes for those cuts.
If you're looking for turbulence free, buy a Piersel. You get a truly uninterrupted airway from the chamber to the slot.
The rest of the pack does a very good job of compensating for their more traditional methods of construction, so you can make do with their offerings.
On the topic of moisture content, wide open VS traditional airways, drying down the Virginias improves their flavors for me. Airway theology makes no appreciable difference to me in that respect.
There are blends such as Dunbar that I like better in a larger bowl, which is why I commissioned the "Big Ass" Jack Howell. It also smokes just as well in my 1906 large Barling bent billiard. Too bad the 2021 and 2022 Dunbar is crap compared to earlier years. But that's a different topic.
On the subject of dedicating one pipe to one blend, the reason for it is that the pipe becomes "seasoned" with the esters and oils of that blend, which in turn reinforces the flavors of that blend when smoked in that pipe. I've done this and it absolutely works.
Frankly, I'm too lazy to want to clean that many pipes a day. So I've given up that final 5% of the flavor experience.
Why, in all of this, isn't the stem design and airway transition into the slot, part of the conversation? Maybe the engineer wasn't a top of the line engineer.
That's it from me, one person's observations FWIW.