Tenon Funnel or Flush Beat Down

[shanez]

This is a fun thread to read. I love theoretical discussions.

Although I doubt anyone has ever calculated the curl of smoke in a pipe (boundary layer effect is my new favorite thing to read about).

And, damn you Bernoulli!

 

[voorhees]

I would think the funneling of the tenon on factory pipes allow for a larger opening so the chance the two openings will actually reasonably meet.

 

[cosmicfolklore]

I would think the funneling of the tenon on factory pipes allow for a larger opening so the chance the two openings will actually reasonably meet.

Absolutely!! And, actually, before this conversation, I had never given the funnel a thought. But, now I am expecting all of my custom mades to be flush, ha ha!!

It is cool to have a place with so many high end pipes to be able to check things like this on. The Briary rocks.

 

[Casual]

I wonder how many years until I am skilled enough to credibly blame the instrument for a bad smoke instead of my own shortcomings. 3? 30?

 

[cosmicfolklore]

I wonder how many years until I am skilled enough to credibly blame the instrument for a bad smoke instead of my own shortcomings.

Actually, the better you get at smoking different types of pipes, the less the pipe will matter. But, it’s just nice to have a few of the finer pipes on hand. But, I enjoy my factory pipes about as often as my better designed and engineered pipes. And, some I have just kicked to the curb for various reasons. YMMV

 

[Ctbill]

This is great, fun reading, and thought provoking.
Provoking the thought: wouldn’t this make the (beloved?) Falcon an engineering marvel? Straight shot from the center of a briar bowl to the mouthpiece... hummmm...

 

[frozenchurchwarden]

I've been carving those funnels into practically all of the stems on my cheap pipes...
Half the time it makes the pipe whistle.

I'd say if I ever do another one I'm just going to go for a VERY subtle chamfer.

 

[mingc]

You guys have it all wrong. The chamfer should be at the bottom of the mortise not the tenon. ?

 

[shanez]

Imma just sit around this weekend pulling the stems off my pipes now. ?

 

[jhowell]

Scientists in Mexico noticed there were short distances on the Aztec canals where the walls were wider apart. Since this appeared at set distances along the canal system they decided to model them on a flow bench. What they discovered was as the velocity of the water flow increased eddy swirls developed where the walls widened that served to choke off or impede the flow thus insuring the flow remained more constant across a varying volume of water. don't know how this applies to air (smoke) flow but throwing it out for consideration.

 

[whsergent]

Reading this thread and taking a flashlight and peering into the shanks of the pipes i like smoking the most, i discovered that they all had tenons that werent long enough to meet flush with the shank.
I guess i dont mind that too much

 

[BROBS]

there are very few pipes where the tenon actually is flush with the bottom of the mortise.. as in like 1%.
otherwise they would bottom out without going all the way in when the wood expanded.

that's why on some pipes you see a goofy "extended" piece that isn't part of the tenon but tries to get close to the draft hole.. but it still doesn't touch the draft hole.
the chamfer allows a smooth transition of air ______] \________rather than it going down into a flat ended dip. ___] [_____

 

[anotherbob]

my best smoker has a huge empty chamber. Sure that creates turbulence or something like that. So maybe they're on to something. Though I still firmly believe that craftsmanship is only part of making a great smoker the other part is adding the proper amount of fairy dust.

 

[cosmicfolklore]

the other part is adding the proper amount of fairy dust.

Absolutely... it's all about the MAGIC!

 

[Casual]

I am on an army mount kick. You should see all the different shapes and chamfers and expansions and contractions going on. And yet, they smoke great.

 

[cosmicfolklore]

You should see all the different shapes and chamfers and expansions and contractions going on. And yet, they smoke great.

Yep, I have a few of these in my rack also. You are right, they mostly don't set flush against anything, and they smoke great. Undoubidibly, it's because there is more magic in an Army Mount.

 

[BROBS]

ask @peregrinus about the magical dust in his pipes

 

[peregrinus]

Oh boy,