I've seen quite a lot of people close over the bowl with their fingers while they puff. What's that for?
Closing over the bowl
- Thread starter damianmonk
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The Venturi effect, by constricting the airflow, you create a pressure that revitalizes the dying embers.
Go easy Now, in the NOW defunct forum Grayfox this topic almost resulted a number of killings !
Hopefully I am not the only one that remembers this !
hoo
Hopefully I am not the only one that remembers this !
hoo
:
It's very effective in keeping a bowl going while it's windy outside if you don't have a wind cap.
I got a C in high school physics, so pay me no attention, but I thought it was like an old time automobile carburetor, where you closed off the air supply somewhat to enrich the fuel supply, in this case tobacco, relative to the oxygen. What I actually know is that it works!
Beyond a certain amount of air necessary for combustion, excess air that you draw into the bowl just tends to cool the ember. Reducing the air flow will reduce the cooling while still allowing sufficient oxygen, the ember gets hotter and you are back in business.
I was actually considering asking this week while driving back and forth to work.
I remember reading a while ago that this practice can cause premature burn outs. Anyone ever hear about that?
I remember reading a while ago that this practice can cause premature burn outs. Anyone ever hear about that?
No need for burnouts, so premature implies it's bound to happen, and it's not a given. Burnouts, though, can occur without that technique. Smoking too hot, not paying attention, etc.
My thoughts have always been... Restricting the intact opening and pulling thru the draw hole with the same PSI suction amount creates a faster and more directed flow into the bowl which is like blowing into a campfire. It provides more air/oxygen in a concentrated area giving more heat just like a match would which in turn fires up the rest of the already hot tobacco. Just as in a campfire situation. We close off and release in this process which allows for the adjoining hot tobacco to start up again, repeating the process relights more and more of the bowl until we are fully lit again.
However besides all this scientific talk, which I love to dive into, Hahaha as Mr so489 said, all I really know is it works.
However besides all this scientific talk, which I love to dive into, Hahaha as Mr so489 said, all I really know is it works.
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