OOH!!! Another good one:
Imagine you have two straws in your mouth...
One goes into a can of soda, and one is just out in the open.
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Breathe in through both of them, and you'll get air and soda into your mouth...
Now, pinch the AIR straw, but leave the SODA straw alone. Take a draw. The AIR straw pulled in less air didn't it? But the SODA straw pulled in more soda.
That's because the vacuum in your mouth/lungs was focused more on the SODA straw, as the AIR straw was pinched off.
For the purposes of an rta with airflow control, it would be like being able to precisely pinch the AIR straw to a certain set degree, to control how much focus the mouth/lung vacuum has on the SODA straw.
So I guess, airflow control should really be looked at as a juice flow control...sure it allows or constricts airflow, but its main effect is on the flow of juice!
Great example HB, I couldn't have done it better myself and I have about a dozen times. Thanks.
Sent with no malice and not a whole lot of forethought from my new Galaxy Tab 4. Thanks Santa!